diff --git a/code/game/atoms.dm b/code/game/atoms.dm
index 47903bbc30..23eb17a7be 100644
--- a/code/game/atoms.dm
+++ b/code/game/atoms.dm
@@ -100,8 +100,10 @@
 /atom/proc/emp_act(var/severity)
 	return
 
-/atom/proc/bullet_act(var/obj/item/projectile/Proj)
-	return 0
+
+/atom/proc/bullet_act(obj/item/projectile/P, def_zone)
+	P.on_hit(src, 0, def_zone)
+	. = 0
 
 /atom/proc/in_contents_of(container)//can take class or object instance as argument
 	if(ispath(container))
@@ -317,7 +319,7 @@ its easier to just keep the beam vertical.
 		var/full_print = md5(H.dna.uni_identity)
 
 		// Add the fingerprints
-		// 
+		//
 		if(fingerprints[full_print])
 			switch(stringpercent(fingerprints[full_print]))		//tells us how many stars are in the current prints.
 
@@ -326,7 +328,7 @@ its easier to just keep the beam vertical.
 						fingerprints[full_print] = full_print 		// You rolled a one buddy.
 					else
 						fingerprints[full_print] = stars(full_print, rand(0,40)) // 24 to 32
-						
+
 				if(24 to 27)
 					if(prob(3))
 						fingerprints[full_print] = full_print     	//Sucks to be you.
@@ -353,7 +355,7 @@ its easier to just keep the beam vertical.
 
 		else
 			fingerprints[full_print] = stars(full_print, rand(0, 20))	//Initial touch, not leaving much evidence the first time.
-		
+
 
 		return 1
 	else
diff --git a/code/game/objects/effects/spawners/bombspawner.dm b/code/game/objects/effects/spawners/bombspawner.dm
index 1d59701bb7..26d56c153e 100644
--- a/code/game/objects/effects/spawners/bombspawner.dm
+++ b/code/game/objects/effects/spawners/bombspawner.dm
@@ -137,8 +137,8 @@
 	OT.master = V
 
 	PT.air_contents.temperature = PLASMA_FLASHPOINT
-	PT.air_contents.toxins = 3
-	PT.air_contents.carbon_dioxide = 17
+	PT.air_contents.toxins = 12
+	PT.air_contents.carbon_dioxide = 8
 	PT.air_contents.update_values()
 
 	OT.air_contents.temperature = PLASMA_FLASHPOINT
diff --git a/code/game/objects/items/weapons/manuals.dm b/code/game/objects/items/weapons/manuals.dm
index ed51855f21..bca330cc4e 100644
--- a/code/game/objects/items/weapons/manuals.dm
+++ b/code/game/objects/items/weapons/manuals.dm
@@ -123,7 +123,7 @@
 
 
 				<h2>O2-Reaction Mode</h2>
-				
+
 				The second mode for running the engine uses a gas mixture to produce a reaction within the supermatter. This mode requires the CE's or Atmospheric's help to set up. This is called 'O2-Reaction Mode.'</br></br>
 
 				<b><u>THIS MODE CAN CAUSE A RUNAWAY REACTION, LEADING TO CATASTROPHIC FAILURE IF NOT MAINTAINED. NEVER FORGET ABOUT THE ENGINE IN THIS MODE.</u></b></br></br>
@@ -225,7 +225,7 @@
 				<h2>Power outage</h2>
 
 				A power problem has made the entire station lose power? Could be station-wide wiring problems or syndicate power sinks. In any case follow these steps:
-				
+
 				<ol>
 					<li><b><font color='red'>PANIC!</font></b></li>
 					<li>Get your ass over to engineering! <b>QUICKLY!!!</b></li>
@@ -284,7 +284,7 @@
 				</ol>
 				<p>
 				Note that for a successful harvest, the body from which the blood was taken from must be dead BEFORE harvesting the pod, however the pod can be growing while they are still alive. Otherwise, the soul would not be able to migrate to the new Diona body.<br><br>
-				
+
 				It really is that easy! Good luck!
 
 				</body>
@@ -447,7 +447,7 @@
 					<li>Secure the external reinforced armor plating with a wrench.</li>
 					<li>Weld the external reinforced armor plating to the chassis.</li>
 				</ol>
-				
+
 				<h2>Additional Information:</h2>
 				<ul>
 					<li>The firefighting variation is made in a similar fashion.</li>
@@ -499,7 +499,7 @@
 				In addition to this important purpose, the R&D console has a disk menu that lets you transfer data from the database onto disk or from the disk into the database.
 				It also has a settings menu that lets you re-sync with nearby R&D devices (if they've become disconnected), lock the console from the unworthy,
 				upload the data to all other R&D consoles in the network (all R&D consoles are networked by default), connect/disconnect from the network, and purge all data from the database.<br><br>
-				
+
 				<b>NOTE:</b> The technology list screen, circuit imprinter, and protolathe menus are accessible by non-scientists. This is intended to allow 'public' systems for the plebians to utilize some new devices.
 
 				<h2>Destructive Analyzer</h2>
@@ -687,7 +687,7 @@
 
 				<h2><a name="Repairs">Cyborg Repairs</h2>
 				Occasionally a Cyborg may become damaged. This could be in the form of impact damage from a heavy or fast-travelling object, or it could be heat damage from high temperatures, or even lasers or Electromagnetic Pulses (EMPs).
-	
+
 				<h3>Dents</h3>
 				If a cyborg becomes damaged due to impact from heavy or fast-moving objects, it will become dented. Sure, a dent may not seem like much, but it can compromise the structural integrity of the cyborg, possibly causing a critical failure.
 				Dents in a cyborg's frame are rather easy to repair, all you need is to apply a welding tool to the dented area, and the high-tech cyborg frame will repair the dent under the heat of the welder.
@@ -779,9 +779,9 @@
 				<body>
 				<br>
 				<h1>The Oath</h1>
-				
+
 				<i>The Medical Oath sworn by recognised medical practitioners in the employ of NanoTrasen</i><br>
-				
+
 				<ol>
 					<li>Now, as a new doctor, I solemnly promise that I will, to the best of my ability, serve humanity-caring for the sick, promoting good health, and alleviating pain and suffering.</li>
 					<li>I recognise that the practice of medicine is a privilege with which comes considerable responsibility and I will not abuse my position.</li>
@@ -922,7 +922,7 @@
 
 				<h3>Irish Cream:</h3>
 				Mix cream and whiskey into a glass.
-				
+
 				<h3>The Manly Dorf:</h3>
 				Mix ale and beer into a glass.
 
@@ -1000,9 +1000,9 @@
 				<body>
 				<h1>Nuclear Explosives 101</h1>
 				Hello and thank you for choosing the Syndicate for your nuclear information needs. Today's crash course will deal with the operation of a Fusion Class NanoTrasen made Nuclear Device.<br><br>
-				
+
 				First and foremost, DO NOT TOUCH ANYTHING UNTIL THE BOMB IS IN PLACE. Pressing any button on the compacted bomb will cause it to extend and bolt itself into place. If this is done, to unbolt it, one must completely log in, which at this time may not be possible.<br>
-				
+
 				<h2>To make the nuclear device functional</h2>
 				<ul>
 					<li>Place the nuclear device in the designated detonation zone.</li>
@@ -1012,20 +1012,20 @@
 					<b>Note</b>: If you make a mistake, press R to reset the device.
 					<li>Press the E button to log on to the device.</li>
 				</ul><br>
-				
+
 				You now have activated the device. To deactivate the buttons at anytime, for example when you've already prepped the bomb for detonation, remove the authentication disk OR press R on the keypad.<br><br>
 				Now the bomb CAN ONLY be detonated using the timer. Manual detonation is not an option. Toggle off the SAFETY.<br>
 				<b>Note</b>: You wouldn't believe how many Syndicate Operatives with doctorates have forgotten this step.<br><br>
-				
-				So use the - - and + + to set a detonation time between 5 seconds and 10 minutes. Then press the timer toggle button to start the countdown. Now remove the authentication disk so that the buttons deactivate.<br>				
+
+				So use the - - and + + to set a detonation time between 5 seconds and 10 minutes. Then press the timer toggle button to start the countdown. Now remove the authentication disk so that the buttons deactivate.<br>
 				<b>Note</b>: THE BOMB IS STILL SET AND WILL DETONATE<br><br>
-				
+
 				Now before you remove the disk, if you need to move the bomb, you can toggle off the anchor, move it, and re-anchor.<br><br>
-				
+
 				Remember the order:<br>
 				<b>Disk, Code, Safety, Timer, Disk, RUN!</b><br><br>
 				Intelligence Analysts believe that normal NanoTrasen procedure is for the Captain to secure the nuclear authentication disk.<br><br>
-				
+
 				Good luck!
 				</body>
 			</html>
@@ -1048,7 +1048,7 @@
 				</style>
 				</head>
 				<body>
-				
+
 				<h1><a name="Contents">Contents</a></h1>
 				<ol>
 					<li><a href="#Foreword">Author's Foreword</a></li>
@@ -1077,7 +1077,6 @@
 				<ul>
 				<li><b>Straight pipes:</b> They're pipes. One-meter sections. Straight line. Pretty simple. Just about every pipe and device is based around this
 				standard one-meter size, so most things will take up as much space as one of these.</li>
-<<<<<<< HEAD
 				<li><b>Bent pipes:</b> Pipes with a 90 degree bend at the half-meter mark. My goodness.</li>
 				<li><b>Pipe manifolds:</b> Pipes that are essentially a "T" shape, allowing you to connect three things at one point.</li>
 				<li><b>4-way manifold:</b> A four-way junction.</li>
@@ -1085,9 +1084,8 @@
 				<li><b>Manual valve:</b> A valve that will block off airflow when turned. Can't be used by the AI or cyborgs, because they don't have hands.</li>
 				<li><b>Manual T-valve:</b> Like a manual valve, but at the center of a manifold instead of a straight pipe.</li><BR><BR>
 				</ul>
-				
+
 				<h1><a name="Insulated"><B>Insulated Pipes</B></a></h1>
-=======
 				<li><I>Bent pipes:</I> Pipes with a 90 degree bend at the half-meter mark. My goodness.</li>
 				<li><I>Pipe manifolds:</I> Pipes that are essentially a "T" shape, allowing you to connect three things at one point.</li>
 				<li><I>4-way manifold:</I> A four-way junction.</li>
@@ -1096,7 +1094,6 @@
 				<li><I>Manual T-Valve:</I> Like a manual valve, but at the center of a manifold instead of a straight pipe.</li><BR><BR>
 
 				<h1><a name="Insulated"><B>Insulated Pipes</B></a></h1><BR>
->>>>>>> 4b04be7536168ccf4a73c91dcaa4681e4db18a4e
 				<I>Special Public Service Announcement.</I><BR>
 				Our regular pipes are already insulated. These are completely worthless. Punch anyone who uses them.<BR><BR>
 
@@ -1105,12 +1102,8 @@
 				This is usually where people get frightened, afraid, and start calling on their gods and/or cowering in fear. Yes, I can see you doing that right now.
 				Stop it. It's unbecoming. Most of these are fairly straightforward.<BR>
 
-<<<<<<< HEAD
 				<ul>
 				<li><b>Gas pump:</b> Take a wild guess. It moves gas in the direction it's pointing (marked by the red line on one end). It moves it based on pressure, the maximum output being 4500 kPa (kilopascals).
-=======
-				<li><I>Gas pump:</I> Take a wild guess. It moves gas in the direction it's pointing (marked by the red line on one end). It moves it based on pressure, the maximum output being 4500 kPa (kilopascals).
->>>>>>> 4b04be7536168ccf4a73c91dcaa4681e4db18a4e
 				Ordinary atmospheric pressure, for comparison, is 101.3 kPa, and the minimum pressure of room-temperature pure oxygen needed to not suffocate in a matter of minutes is 16 kPa
 				(though 18 kPa is preferred using internals, for various reasons).</li>
 				<li><b>Volume pump:</b> This pump goes based on volume, instead of pressure, and the possible maximum pressure it can create in the pipe on the receiving end is double the gas pump because of this,
@@ -1127,28 +1120,17 @@
 				<li><b>Gas filter:</b> Essentially the opposite of a gas mixer. One side is input. The other two sides are output. One gas type will be filtered into the perpendicular output pipe,
 				the rest will continue out the other side. Can also output from 0-4500 kPa.</li>
 				</ul>
-				
+
 				<h1><a name="HES"><B>Heat Exchange Systems</B></a></h1>
 				<I>Will not set you on fire.</I><BR>
 				These systems are used to only transfer heat between two pipes. They will not move gases or any other element, but will equalize the temperature (eventually). Note that because of how gases work (remember: pv=nRt),
 				a higher temperature will raise pressure, and a lower one will lower temperature.<BR>
 
-<<<<<<< HEAD
-				<ul>
-				<li><b>Pipe:</b> This is a pipe that will exchange heat with the surrounding atmosphere. Place in fire for superheating. Place in space for supercooling.</li>
-				<li><b>Bent pipe:</b> Take a wild guess.</li>
-				<li><b>Junction:</b> The point where you connect your normal pipes to heat exchange pipes. Not necessary for heat exchangers, but necessary for H/E pipes/bent pipes.</li>
-				<li><b>Heat exchanger:</b> These funky-looking bits attach to an open pipe end. Put another heat exchanger directly across from it, and you can transfer heat across two pipes without having to have the gases touch.
-				This normally shouldn't exchange with the ambient air, despite being totally exposed. Just don't ask questions...</li>
-				</ul><BR>
-=======
 				<li><I>Pipe:</I> This is a pipe that will exchange heat with the surrounding atmosphere. Place in fire for superheating. Place in space for supercooling.</li>
 				<li><I>Bent pipe:</I> Take a wild guess.</li>
 				<li><I>Junction:</I> The point where you connect your normal pipes to heat exchange pipes. Not necessary for heat exchangers, but necessary for H/E pipes/bent pipes.</li>
 				<li><I>Heat exchanger:</I> These funky-looking bits attach to an open pipe end. Put another heat exchanger directly across from it, and you can transfer heat across two pipes without having to have the gases touch.
 				This normally shouldn't exchange with the ambient air, despite being totally exposed. Just don't ask questions...</li><BR>
->>>>>>> 4b04be7536168ccf4a73c91dcaa4681e4db18a4e
-
 
 				That's about it for pipes. Go forth, armed with this knowledge, and try not to break, burn down, or kill anything. Please.
 
@@ -1173,10 +1155,10 @@
 				</style>
 				</head>
 				<body>
-				
+
 				<h1><a name="Foreword">EVA Gear and You: Not Spending All Day Inside</a></h1>
 				<I>Or: How not to suffocate because there's a hole in your shoes</I><BR>
-				
+
 				<h2><a name="Contents">Contents</a></h2>
 				<ol>
 					<li><a href="#Foreword">A foreword on using EVA gear</a></li>
diff --git a/code/game/objects/structures/grille.dm b/code/game/objects/structures/grille.dm
index bfdad4e2bc..97d7657d36 100644
--- a/code/game/objects/structures/grille.dm
+++ b/code/game/objects/structures/grille.dm
@@ -93,7 +93,13 @@
 			return !density
 
 /obj/structure/grille/bullet_act(var/obj/item/projectile/Proj)
+
 	if(!Proj)	return
+
+	//Tasers and the like should not damage grilles.
+	if(Proj.damage_type == HALLOSS)
+		return
+
 	src.health -= Proj.damage*0.2
 	healthcheck()
 	return 0
diff --git a/code/game/objects/structures/window.dm b/code/game/objects/structures/window.dm
index 843ab7dd37..0f73a44ffb 100644
--- a/code/game/objects/structures/window.dm
+++ b/code/game/objects/structures/window.dm
@@ -18,6 +18,11 @@
 
 
 /obj/structure/window/bullet_act(var/obj/item/projectile/Proj)
+
+	//Tasers and the like should not damage windows.
+	if(Proj.damage_type == HALLOSS)
+		return
+
 	health -= Proj.damage
 	..()
 	if(health <= 0)
diff --git a/code/modules/clothing/clothing.dm b/code/modules/clothing/clothing.dm
index b670d1a295..da36e5544a 100644
--- a/code/modules/clothing/clothing.dm
+++ b/code/modules/clothing/clothing.dm
@@ -194,7 +194,7 @@ BLIND     // can't see anything
 	name = "Space helmet"
 	icon_state = "space"
 	desc = "A special helmet designed for work in a hazardous, low-pressure environment."
-	flags = FPRINT | TABLEPASS | HEADCOVERSEYES | BLOCKHAIR | HEADCOVERSMOUTH | STOPSPRESSUREDMAGE
+	flags = FPRINT | TABLEPASS | HEADCOVERSEYES | BLOCKHAIR | HEADCOVERSMOUTH | STOPSPRESSUREDMAGE | THICKMATERIAL
 	item_state = "space"
 	permeability_coefficient = 0.01
 	armor = list(melee = 0, bullet = 0, laser = 0,energy = 0, bomb = 0, bio = 100, rad = 50)
@@ -212,7 +212,7 @@ BLIND     // can't see anything
 	w_class = 4//bulky item
 	gas_transfer_coefficient = 0.01
 	permeability_coefficient = 0.02
-	flags = FPRINT | TABLEPASS | STOPSPRESSUREDMAGE
+	flags = FPRINT | TABLEPASS | STOPSPRESSUREDMAGE | THICKMATERIAL
 	body_parts_covered = UPPER_TORSO|LOWER_TORSO|LEGS|FEET|ARMS|HANDS
 	allowed = list(/obj/item/device/flashlight,/obj/item/weapon/tank/emergency_oxygen)
 	slowdown = 3
diff --git a/code/modules/clothing/head/helmet.dm b/code/modules/clothing/head/helmet.dm
index c4b3c6224f..9b5f6bd3d1 100644
--- a/code/modules/clothing/head/helmet.dm
+++ b/code/modules/clothing/head/helmet.dm
@@ -2,7 +2,7 @@
 	name = "helmet"
 	desc = "Standard Security gear. Protects the head from impacts."
 	icon_state = "helmet"
-	flags = FPRINT | TABLEPASS | HEADCOVERSEYES
+	flags = FPRINT | TABLEPASS | HEADCOVERSEYES | THICKMATERIAL
 	item_state = "helmet"
 	armor = list(melee = 50, bullet = 15, laser = 50,energy = 10, bomb = 25, bio = 0, rad = 0)
 	flags_inv = HIDEEARS|HIDEEYES
diff --git a/code/modules/clothing/suits/armor.dm b/code/modules/clothing/suits/armor.dm
index 56ef9b7773..39ff06677c 100644
--- a/code/modules/clothing/suits/armor.dm
+++ b/code/modules/clothing/suits/armor.dm
@@ -2,7 +2,7 @@
 /obj/item/clothing/suit/armor
 	allowed = list(/obj/item/weapon/gun/energy,/obj/item/weapon/reagent_containers/spray/pepper,/obj/item/weapon/gun/projectile,/obj/item/ammo_magazine,/obj/item/ammo_casing,/obj/item/weapon/melee/baton,/obj/item/weapon/handcuffs)
 	body_parts_covered = UPPER_TORSO|LOWER_TORSO
-	flags = FPRINT | TABLEPASS
+	flags = FPRINT | TABLEPASS | THICKMATERIAL
 
 	cold_protection = UPPER_TORSO|LOWER_TORSO
 	min_cold_protection_temperature = ARMOR_MIN_COLD_PROTECTION_TEMPERATURE
diff --git a/code/modules/mob/death.dm b/code/modules/mob/death.dm
index 86f7ce0b49..797715c33e 100644
--- a/code/modules/mob/death.dm
+++ b/code/modules/mob/death.dm
@@ -48,6 +48,12 @@
 
 
 /mob/proc/death(gibbed)
+
+	//Quick fix for corpses kept propped up in chairs. ~Z
+	drop_r_hand()
+	drop_l_hand()
+	//End of fix.
+
 	timeofdeath = world.time
 
 	living_mob_list -= src
diff --git a/code/modules/mob/hear_say.dm b/code/modules/mob/hear_say.dm
index ab500a9630..7aa359c2c4 100644
--- a/code/modules/mob/hear_say.dm
+++ b/code/modules/mob/hear_say.dm
@@ -19,7 +19,7 @@
 	if(language)
 		verb = language.speech_verb
 		style = language.colour
-		
+
 	var/speaker_name = speaker.name
 	if(istype(speaker, /mob/living/carbon/human))
 		var/mob/living/carbon/human/H = speaker
@@ -71,7 +71,7 @@
 		verb = language.speech_verb
 		style = language.colour
 
-	
+
 
 	if(hard_to_hear)
 		message = stars(message)
@@ -89,11 +89,28 @@
 	if(hard_to_hear)
 		speaker_name = "unknown"
 
+	var/changed_voice
+
 	if(istype(src, /mob/living/silicon/ai) && !hard_to_hear)
 		var/jobname // the mob's "job"
+		var/mob/living/carbon/human/impersonating //The crewmember being impersonated, if any.
+
 		if (ishuman(speaker))
 			var/mob/living/carbon/human/H = speaker
-			jobname = H.get_assignment()
+
+			if((H.wear_id && istype(H.wear_id,/obj/item/weapon/card/id/syndicate)) && (H.wear_mask && istype(H.wear_mask,/obj/item/clothing/mask/gas/voice)))
+
+				changed_voice = 1
+				var/mob/living/carbon/human/I = locate(speaker_name)
+
+				if(I)
+					impersonating = I
+					jobname = impersonating.get_assignment()
+				else
+					jobname = "Unknown"
+			else
+				jobname = H.get_assignment()
+
 		else if (iscarbon(speaker)) // Nonhuman carbon mob
 			jobname = "No id"
 		else if (isAI(speaker))
@@ -105,7 +122,13 @@
 		else
 			jobname = "Unknown"
 
-		track = "<a href='byond://?src=\ref[src];track=\ref[speaker]'>[speaker_name] ([jobname])</a>"
+		if(changed_voice)
+			if(impersonating)
+				track = "<a href='byond://?src=\ref[src];trackname=[speaker_name];track=\ref[impersonating]'>[speaker_name] ([jobname])</a>"
+			else
+				track = "[speaker_name] ([jobname])"
+		else
+			track = "<a href='byond://?src=\ref[src];trackname=[speaker_name];track=\ref[speaker]'>[speaker_name] ([jobname])</a>"
 
 	if(istype(src, /mob/dead/observer))
 		if(speaker_name != speaker.real_name && !isAI(speaker)) //Announce computer and various stuff that broadcasts doesn't use it's real name but AI's can't pretend to be other mobs.
diff --git a/code/modules/mob/living/carbon/human/human.dm b/code/modules/mob/living/carbon/human/human.dm
index 89f3b8eccc..2dfb42bb34 100644
--- a/code/modules/mob/living/carbon/human/human.dm
+++ b/code/modules/mob/living/carbon/human/human.dm
@@ -1291,3 +1291,22 @@
 		W.update_icon()
 		W.message = message
 		W.add_fingerprint(src)
+
+/mob/living/carbon/human/can_inject(var/mob/user, var/error_msg, var/target_zone)
+	. = 1
+
+	if(!user)
+		target_zone = pick("chest","chest","chest","left leg","right leg","left arm", "right arm", "head")
+	else if(!target_zone)
+		target_zone = user.zone_sel.selecting
+
+	switch(target_zone)
+		if("head")
+			if(head && head.flags & THICKMATERIAL)
+				. = 0
+		else
+			if(wear_suit && wear_suit.flags & THICKMATERIAL)
+				. = 0
+	if(!. && error_msg && user)
+ 		// Might need re-wording.
+		user << "<span class='alert'>There is no exposed flesh or thin material [target_zone == "head" ? "on their head" : "on their body"] to inject into.</span>"
\ No newline at end of file
diff --git a/code/modules/mob/living/carbon/human/human_defense.dm b/code/modules/mob/living/carbon/human/human_defense.dm
index c3e6cb4397..44deb248ca 100644
--- a/code/modules/mob/living/carbon/human/human_defense.dm
+++ b/code/modules/mob/living/carbon/human/human_defense.dm
@@ -52,7 +52,7 @@ emp_act
 				return -1 // complete projectile permutation
 
 	if(check_shields(P.damage, "the [P.name]"))
-		P.on_hit(src, 2)
+		P.on_hit(src, 2, def_zone)
 		return 2
 
 //BEGIN BOOK'S TASER NERF.
diff --git a/code/modules/mob/living/living.dm b/code/modules/mob/living/living.dm
index 93a3298b89..4998c4cbc8 100644
--- a/code/modules/mob/living/living.dm
+++ b/code/modules/mob/living/living.dm
@@ -211,6 +211,9 @@
 		O.emp_act(severity)
 	..()
 
+/mob/living/proc/can_inject()
+	return 1
+
 /mob/living/proc/get_organ_target()
 	var/mob/shooter = src
 	var/t = shooter:zone_sel.selecting
diff --git a/code/modules/mob/living/living_defense.dm b/code/modules/mob/living/living_defense.dm
index 9e94ab6ac3..508ff93e23 100644
--- a/code/modules/mob/living/living_defense.dm
+++ b/code/modules/mob/living/living_defense.dm
@@ -58,7 +58,7 @@
 		return 2
 	if(!P.nodamage)
 		apply_damage((P.damage/(absorb+1)), P.damage_type, def_zone, absorb, 0, P)
-	P.on_hit(src, absorb)
+	P.on_hit(src, absorb, def_zone)
 	return absorb
 
 /mob/living/hitby(atom/movable/AM as mob|obj,var/speed = 5)//Standardization and logging -Sieve
diff --git a/code/modules/mob/living/silicon/ai/ai.dm b/code/modules/mob/living/silicon/ai/ai.dm
index 62331233a8..88c1c9b79d 100644
--- a/code/modules/mob/living/silicon/ai/ai.dm
+++ b/code/modules/mob/living/silicon/ai/ai.dm
@@ -94,7 +94,7 @@ var/list/ai_list = list()
 		/mob/living/silicon/ai/proc/ai_camera_list, /mob/living/silicon/ai/proc/ai_network_change, \
 		/mob/living/silicon/ai/proc/ai_statuschange, /mob/living/silicon/ai/proc/ai_hologram_change, \
 		/mob/living/silicon/ai/proc/toggle_camera_light)
-		
+
 
 	if(!safety)//Only used by AIize() to successfully spawn an AI.
 		if (!B)//If there is no player/brain inside.
@@ -146,7 +146,7 @@ var/list/ai_list = list()
 /obj/machinery/ai_powersupply
 	name="Power Supply"
 	active_power_usage=1000
-	use_power = 2	
+	use_power = 2
 	power_channel = EQUIP
 	var/mob/living/silicon/ai/powered_ai = null
 	invisibility = 100
@@ -155,12 +155,12 @@ var/list/ai_list = list()
 	powered_ai = ai
 	if(isnull(powered_ai))
 		Del()
-	
+
 	loc = powered_ai.loc
 	use_power(1) // Just incase we need to wake up the power system.
 
 	..()
-	
+
 /obj/machinery/ai_powersupply/process()
 	if(!powered_ai || powered_ai.stat & DEAD)
 		Del()
@@ -410,8 +410,18 @@ var/list/ai_list = list()
 		if(A && target)
 			A.ai_actual_track(target)
 */
-		if(target)
+
+		//Strip off any "(as Derplord)".
+		//If there's a way to do this via a var that doesn't give the AI extra info, please let me know.
+		var/seeking = target.name
+		var/index = findtext(seeking, "(as ")
+		if(index)
+			seeking = copytext(seeking, 1, index-1)
+
+		if(target && href_list["trackname"] == seeking)
 			ai_actual_track(target)
+		else
+			src << "\red System error. Cannot locate [href_list["trackname"]]."
 		return
 
 	else if (href_list["faketrack"])
diff --git a/code/modules/mob/living/silicon/silicon.dm b/code/modules/mob/living/silicon/silicon.dm
index afdeeb81d4..944063d9e0 100644
--- a/code/modules/mob/living/silicon/silicon.dm
+++ b/code/modules/mob/living/silicon/silicon.dm
@@ -201,3 +201,9 @@
 	dat += "<br>"
 	src << browse(dat, "window=airoster")
 	onclose(src, "airoster")
+
+//can't inject synths
+/mob/living/silicon/can_inject(var/mob/user, var/error_msg)
+	if(error_msg)
+		user << "<span class='alert'>The armoured plating is too tough.</span>"
+	return 0
diff --git a/code/modules/paperwork/pen.dm b/code/modules/paperwork/pen.dm
index 2548c764ec..369f1a7819 100644
--- a/code/modules/paperwork/pen.dm
+++ b/code/modules/paperwork/pen.dm
@@ -90,12 +90,17 @@
 	origin_tech = "materials=2;syndicate=5"
 
 
-/obj/item/weapon/pen/paralysis/attack(mob/M as mob, mob/user as mob)
+/obj/item/weapon/pen/paralysis/attack(mob/living/M as mob, mob/user as mob)
+
 	if(!(istype(M,/mob)))
 		return
+
 	..()
-	if(reagents.total_volume)
-		if(M.reagents) reagents.trans_to(M, 50)
+
+
+	if(M.can_inject(user,1))
+		if(reagents.total_volume)
+			if(M.reagents) reagents.trans_to(M, 50)
 	return
 
 
diff --git a/code/modules/projectiles/targeting.dm b/code/modules/projectiles/targeting.dm
index 11e31828f4..f2c57c0f0e 100644
--- a/code/modules/projectiles/targeting.dm
+++ b/code/modules/projectiles/targeting.dm
@@ -1,8 +1,10 @@
 /obj/item/weapon/gun/verb/toggle_firerate()
 	set name = "Toggle Firerate"
 	set category = "Object"
+
 	firerate = !firerate
-	if (firerate == 0)
+
+	if (firerate)
 		loc << "You will now continue firing when your target moves."
 	else
 		loc << "You will now only fire once, then lower your aim, when your target moves."
diff --git a/code/modules/reagents/reagent_containers/borghydro.dm b/code/modules/reagents/reagent_containers/borghydro.dm
index 8491c35fa8..a8d88bcf20 100644
--- a/code/modules/reagents/reagent_containers/borghydro.dm
+++ b/code/modules/reagents/reagent_containers/borghydro.dm
@@ -62,14 +62,15 @@
 	var/datum/reagents/R = reagent_list[reagent_list.len]
 	R.add_reagent(reagent, 30)
 
-/obj/item/weapon/reagent_containers/borghypo/attack(mob/M as mob, mob/user as mob)
+/obj/item/weapon/reagent_containers/borghypo/attack(mob/living/M as mob, mob/user as mob)
 	var/datum/reagents/R = reagent_list[mode]
 	if(!R.total_volume)
 		user << "\red The injector is empty."
 		return
-	if (!( istype(M, /mob) ))
+	if (!(istype(M)))
 		return
-	if (R.total_volume)
+
+	if (R.total_volume && M.can_inject(user,1))
 		user << "\blue You inject [M] with the injector."
 		M << "\red You feel a tiny prick!"
 
diff --git a/code/modules/reagents/reagent_containers/syringes.dm b/code/modules/reagents/reagent_containers/syringes.dm
index 72275227e3..183e74fba0 100644
--- a/code/modules/reagents/reagent_containers/syringes.dm
+++ b/code/modules/reagents/reagent_containers/syringes.dm
@@ -140,11 +140,23 @@
 					return
 
 				if(ismob(target) && target != user)
+
 					var/time = 30 //Injecting through a hardsuit takes longer due to needing to find a port.
+
 					if(istype(target,/mob/living/carbon/human))
+
 						var/mob/living/carbon/human/H = target
-						if(H.wear_suit && istype(H.wear_suit,/obj/item/clothing/suit/space))
-							time = 60
+						if(H.wear_suit)
+							if(istype(H.wear_suit,/obj/item/clothing/suit/space))
+								time = 60
+							else if(!H.can_inject(user, 1))
+								return
+
+					else if(isliving(target))
+
+						var/mob/living/M = target
+						if(!M.can_inject(user, 1))
+							return
 
 					for(var/mob/O in viewers(world.view, user))
 						if(time == 30)
diff --git a/code/modules/reagents/syringe_gun.dm b/code/modules/reagents/syringe_gun.dm
index 2600d11676..07693c086d 100644
--- a/code/modules/reagents/syringe_gun.dm
+++ b/code/modules/reagents/syringe_gun.dm
@@ -93,10 +93,18 @@
 						M.attack_log += "\[[time_stamp()]\] <b>UNKNOWN SUBJECT (No longer exists)</b> shot <b>[M]/[M.ckey]</b> with a <b>syringegun</b> ([R])"
 						msg_admin_attack("UNKNOWN shot [M] ([M.ckey]) with a <b>syringegun</b> ([R]) (<A HREF='?_src_=holder;adminplayerobservecoodjump=1;X=[user.x];Y=[user.y];Z=[user.z]'>JMP</a>)")
 
-					if(D.reagents)
-						D.reagents.trans_to(M, 15)
+					var/mob/living/T
+					if(istype(M,/mob/living))
+						T = M
+
 					M.visible_message("<span class='danger'>[M] is hit by the syringe!</span>")
 
+					if(T && istype(T) && T.can_inject())
+						if(D.reagents)
+							D.reagents.trans_to(M, 15)
+					else
+						M.visible_message("<span class='danger'>The syringe bounces off [M]!</span>")
+
 					del(D)
 					break
 			if(D)
diff --git a/code/setup.dm b/code/setup.dm
index 837846e2ba..f3f3895c29 100644
--- a/code/setup.dm
+++ b/code/setup.dm
@@ -199,6 +199,7 @@ var/MAX_EXPLOSION_RANGE = 14
 #define MASKCOVERSMOUTH		2048		// on other items, these are just for mask/head
 #define HEADCOVERSMOUTH		2048
 
+#define THICKMATERIAL 1024		//From /tg: prevents syringes, parapens and hypos if the external suit or helmet (if targeting head) has this flag. Example: space suits, biosuit, bombsuits, thick suits that cover your body. (NOTE: flag shared with NOSLIP for shoes)
 #define NOSLIP		1024 		//prevents from slipping on wet floors, in space etc
 
 #define OPENCONTAINER	4096	// is an open container for chemistry purposes