diff --git a/code/controllers/configuration.dm b/code/controllers/configuration.dm
index 350a1ea839d..e54ac11d389 100644
--- a/code/controllers/configuration.dm
+++ b/code/controllers/configuration.dm
@@ -96,6 +96,8 @@
 	var/ban_legacy_system = 0	//Defines whether the server uses the legacy banning system with the files in /data or the SQL system. Config option in config.txt
 	var/use_age_restriction_for_jobs = 0 //Do jobs use account age restrictions? --requires database
 
+	var/use_recursive_explosions //Defines whether the server uses recursive or circular explosions.
+
 	var/assistant_maint = 0 //Do assistants get maint access?
 	var/gateway_delay = 18000 //How long the gateway takes before it activates. Default is half an hour.
 	var/ghost_interaction = 0
@@ -158,6 +160,9 @@
 				if ("jobs_have_minimal_access")
 					config.jobs_have_minimal_access = 1
 
+				if ("use_recursive_explosions")
+					use_recursive_explosions = 1
+
 				if ("log_ooc")
 					config.log_ooc = 1
 
diff --git a/code/game/objects/explosion.dm b/code/game/objects/explosion.dm
index e2975ad9d46..4c0557197b0 100644
--- a/code/game/objects/explosion.dm
+++ b/code/game/objects/explosion.dm
@@ -10,6 +10,11 @@
 proc/explosion(turf/epicenter, devastation_range, heavy_impact_range, light_impact_range, flash_range, adminlog = 1)
 	src = null	//so we don't abort once src is deleted
 	spawn(0)
+		if(config.use_recursive_explosions)
+			var/power = devastation_range * 2 + heavy_impact_range + light_impact_range //The ranges add up, ie light 14 includes both heavy 7 and devestation 3. So this calculation means devestation counts for 4, heavy for 2 and light for 1 power, giving us a cap of 27 power.
+			explosion_rec(epicenter, power)
+			return
+
 		var/start = world.timeofday
 		epicenter = get_turf(epicenter)
 		if(!epicenter) return
diff --git a/code/game/objects/explosion_recursive.dm b/code/game/objects/explosion_recursive.dm
index 80b52811800..cfa1d7e0e53 100644
--- a/code/game/objects/explosion_recursive.dm
+++ b/code/game/objects/explosion_recursive.dm
@@ -66,7 +66,11 @@ proc/explosion_rec(turf/epicenter, power)
 		if(ET.max_power <= 0) continue
 		if(!ET.turf) continue
 
-		var/severity = 4 - round(max(min( 3, (ET.max_power / 3) ) ,1), 1)
+		//Wow severity looks confusing to calculate... Fret not, I didn't leave you with any additional instructions or help. (just kidding, see the line under the calculation)
+		var/severity = 4 - round(max(min( 3, ((ET.max_power - ET.turf.explosion_resistance) / (max(3,(power/3)))) ) ,1), 1)
+								//sanity			effective power on tile				divided by either 3 or one third the total explosion power
+								//															One third because there are three power levels and I
+								//															want each one to take up a third of the crater
 		var/x = ET.turf.x
 		var/y = ET.turf.y
 		var/z = ET.turf.z
diff --git a/config/config.txt b/config/config.txt
index caf1e968fb5..a07c23387f3 100644
--- a/config/config.txt
+++ b/config/config.txt
@@ -25,6 +25,9 @@ JOBS_HAVE_MINIMAL_ACCESS
 ## you have noone older than 0 days, since noone has been logged yet. Only turn this on once you have had the database up for 30 days.
 #USE_AGE_RESTRICTION_FOR_JOBS
 
+## Unhash this to use recursive explosions, keep it hashed to use circle explosions. Recursive explosions react to walls, airlocks and blast doors, making them look a lot cooler than the boring old circular explosions. They require more CPU and are (as of january 2013) experimental
+#USE_RECURSIVE_EXPLOSIONS
+
 ## log OOC channel
 LOG_OOC