diff --git a/code/modules/events/alien_infestation.dm b/code/modules/events/alien_infestation.dm
index 49fc5a97d86..b230ecff627 100644
--- a/code/modules/events/alien_infestation.dm
+++ b/code/modules/events/alien_infestation.dm
@@ -34,6 +34,8 @@
 			var/mob/living/carbon/alien/larva/new_xeno = new(vent.loc)
 			new_xeno.amount_grown += (0.75 * new_xeno.max_grown)	//event spawned larva start off almost ready to evolve.
 			new_xeno.key = C.key
+			new_xeno.forceMove(vent)
+			new_xeno.add_ventcrawl(vent)
 			if(SSticker && SSticker.mode)
 				SSticker.mode.xenos += new_xeno.mind
 
diff --git a/code/modules/events/blob.dm b/code/modules/events/blob.dm
index edd563fbfe9..4856d532740 100644
--- a/code/modules/events/blob.dm
+++ b/code/modules/events/blob.dm
@@ -27,6 +27,8 @@
 	B.key = M.key
 	B.mind.special_role = SPECIAL_ROLE_BLOB
 	SSticker.mode.update_blob_icons_added(B.mind)
+	B.forceMove(vent)
+	B.add_ventcrawl(vent)
 
 	to_chat(B, "<span class='userdanger'>You are now a mouse, infected with blob spores. Find somewhere isolated... before you burst and become the blob! Use ventcrawl (alt-click on vents) to move around.</span>")
 	to_chat(B, "<span class='motd'>For more information, check the wiki page: ([GLOB.configuration.url.wiki_url]/index.php/Blob)</span>")
diff --git a/code/modules/events/spider_terror.dm b/code/modules/events/spider_terror.dm
index 0ee1a3ef52c..09e4783ecc0 100644
--- a/code/modules/events/spider_terror.dm
+++ b/code/modules/events/spider_terror.dm
@@ -1,4 +1,9 @@
 #define TS_HIGHPOP_TRIGGER 80
+#define GREEN_SPIDER 1
+#define PRINCE_SPIDER 2
+#define WHITE_SPIDER 3
+#define PRINCESS_SPIDER 4
+#define QUEEN_SPIDER 5
 
 /datum/event/spider_terror
 	announceWhen = 240
@@ -23,27 +28,27 @@
 	var/spider_type
 	var/infestation_type
 	if((length(GLOB.clients)) < TS_HIGHPOP_TRIGGER)
-		infestation_type = pick(1, 2, 3, 4)
+		infestation_type = pick(GREEN_SPIDER, PRINCE_SPIDER, WHITE_SPIDER, PRINCESS_SPIDER)
 	else
-		infestation_type = pick(2, 3, 4, 5)
+		infestation_type = pick(PRINCE_SPIDER, WHITE_SPIDER, PRINCESS_SPIDER, QUEEN_SPIDER)
 	switch(infestation_type)
-		if(1)
+		if(GREEN_SPIDER)
 			// Weakest, only used during lowpop.
 			spider_type = /mob/living/simple_animal/hostile/poison/terror_spider/green
 			spawncount = 5
-		if(2)
+		if(PRINCE_SPIDER)
 			// Fairly weak. Dangerous in single combat but has little staying power. Always gets whittled down.
 			spider_type = /mob/living/simple_animal/hostile/poison/terror_spider/prince
 			spawncount = 1
-		if(3)
+		if(WHITE_SPIDER)
 			// Variable. Depends how many they infect.
 			spider_type = /mob/living/simple_animal/hostile/poison/terror_spider/white
 			spawncount = 2
-		if(4)
+		if(PRINCESS_SPIDER)
 			// Pretty strong.
 			spider_type = /mob/living/simple_animal/hostile/poison/terror_spider/queen/princess
 			spawncount = 3
-		if(5)
+		if(QUEEN_SPIDER)
 			// Strongest, only used during highpop.
 			spider_type = /mob/living/simple_animal/hostile/poison/terror_spider/queen
 			spawncount = 1
@@ -59,9 +64,17 @@
 		var/mob/living/simple_animal/hostile/poison/terror_spider/S = new spider_type(vent.loc)
 		var/mob/M = pick_n_take(candidates)
 		S.key = M.key
+		if(infestation_type != PRINCE_SPIDER)
+			S.forceMove(vent)
+			S.add_ventcrawl(vent)
 		SEND_SOUND(S, sound('sound/ambience/antag/terrorspider.ogg'))
 		to_chat(S, "<span class='motd'>For more information, check the wiki page: ([GLOB.configuration.url.wiki_url]/index.php/Terror_Spider)</span>")
 		spawncount--
 		successSpawn = TRUE
 
 #undef TS_HIGHPOP_TRIGGER
+#undef GREEN_SPIDER
+#undef PRINCE_SPIDER
+#undef WHITE_SPIDER
+#undef PRINCESS_SPIDER
+#undef QUEEN_SPIDER