diff --git a/src/g_hexen/a_blastradius.cpp b/src/g_hexen/a_blastradius.cpp
index 6e3b0052b..a78b0b4c8 100644
--- a/src/g_hexen/a_blastradius.cpp
+++ b/src/g_hexen/a_blastradius.cpp
@@ -22,7 +22,7 @@
 //
 //==========================================================================
 
-void BlastActor (AActor *victim, fixed_t strength, fixed_t speed, AActor * Owner, const PClass * blasteffect)
+void BlastActor (AActor *victim, fixed_t strength, fixed_t speed, AActor * Owner, const PClass * blasteffect, bool dontdamage)
 {
 	angle_t angle,ang;
 	AActor *mo;
@@ -67,7 +67,7 @@ void BlastActor (AActor *victim, fixed_t strength, fixed_t speed, AActor * Owner
 	{
 		// Players handled automatically
 	}
-	else
+	else if (!dontdamage)
 	{
 		victim->flags2 |= MF2_BLASTED;
 	}
@@ -83,6 +83,7 @@ enum
 	BF_USEAMMO = 1,
 	BF_DONTWARN = 2,
 	BF_AFFECTBOSSES = 4,
+	BF_NOIMPACTDAMAGE = 8,
 };
 
 //==========================================================================
@@ -145,6 +146,6 @@ DEFINE_ACTION_FUNCTION_PARAMS (AActor, A_Blast)
 		{ // Out of range
 			continue;
 		}
-		BlastActor (mo, strength, speed, self, blasteffect);
+		BlastActor (mo, strength, speed, self, blasteffect, !!(blastflags & BF_NOIMPACTDAMAGE));
 	}
 }
diff --git a/src/p_local.h b/src/p_local.h
index be1697b85..8c43fb89a 100644
--- a/src/p_local.h
+++ b/src/p_local.h
@@ -474,7 +474,7 @@ void	P_AimCamera (AActor *t1, fixed_t &x, fixed_t &y, fixed_t &z, sector_t *&sec
 
 // [RH] Means of death
 void	P_RadiusAttack (AActor *spot, AActor *source, int damage, int distance, 
-						FName damageType, bool hurtSelf, bool dodamage=true, int fulldamagedistance=0);
+						FName damageType, bool hurtSelf, bool dodamage=true, int fulldamagedistance=0, bool noimpactdamage=false);
 
 void	P_DelSector_List();
 void	P_DelSeclist(msecnode_t *);							// phares 3/16/98
diff --git a/src/p_map.cpp b/src/p_map.cpp
index 1dc77dad2..30ca5092a 100644
--- a/src/p_map.cpp
+++ b/src/p_map.cpp
@@ -4446,7 +4446,7 @@ CUSTOM_CVAR (Float, splashfactor, 1.f, CVAR_SERVERINFO)
 //==========================================================================
 
 void P_RadiusAttack (AActor *bombspot, AActor *bombsource, int bombdamage, int bombdistance, FName bombmod,
-	bool DamageSource, bool bombdodamage, int fulldamagedistance)
+	bool DamageSource, bool bombdodamage, int fulldamagedistance, bool noimpactdamage)
 {
 	if (bombdistance <= 0)
 		return;
@@ -4552,7 +4552,7 @@ void P_RadiusAttack (AActor *bombspot, AActor *bombsource, int bombdamage, int b
 				int damage = (int)points;
 
 				if (bombdodamage) P_DamageMobj (thing, bombspot, bombsource, damage, bombmod);
-				else if (thing->player == NULL) thing->flags2 |= MF2_BLASTED;
+				else if (thing->player == NULL && !noimpactdamage) thing->flags2 |= MF2_BLASTED;
 
 				if (!(thing->flags & MF_ICECORPSE))
 				{
diff --git a/src/thingdef/thingdef_codeptr.cpp b/src/thingdef/thingdef_codeptr.cpp
index 0edbb87bd..6bf18b443 100644
--- a/src/thingdef/thingdef_codeptr.cpp
+++ b/src/thingdef/thingdef_codeptr.cpp
@@ -776,6 +776,12 @@ DEFINE_ACTION_FUNCTION_PARAMS(AActor, A_Explode)
 	}
 }
 
+enum
+{
+	RTF_AFFECTSOURCE = 1,
+	RTF_NOIMPACTDAMAGE = 2,
+};
+
 //==========================================================================
 //
 // A_RadiusThrust
@@ -787,9 +793,12 @@ DEFINE_ACTION_FUNCTION_PARAMS(AActor, A_RadiusThrust)
 	ACTION_PARAM_START(3);
 	ACTION_PARAM_INT(force, 0);
 	ACTION_PARAM_INT(distance, 1);
-	ACTION_PARAM_BOOL(affectSource, 2);
+	ACTION_PARAM_INT(thrustFlags, 2);
 	ACTION_PARAM_INT(fullthrustdistance, 3);
 
+	bool affectSource = !!(thrustFlags & RTF_AFFECTSOURCE);
+	bool noimpactdamage = !!(thrustFlags & RTF_NOIMPACTDAMAGE);
+
 	bool sourcenothrust = false;
 
 	if (force <= 0) force = 128;
@@ -803,7 +812,7 @@ DEFINE_ACTION_FUNCTION_PARAMS(AActor, A_RadiusThrust)
 	}
 	int sourceflags2 = self->target != NULL ? self->target->flags2 : 0;
 
-	P_RadiusAttack (self, self->target, force, distance, self->DamageType, affectSource, false, fullthrustdistance);
+	P_RadiusAttack (self, self->target, force, distance, self->DamageType, affectSource, false, fullthrustdistance, noimpactdamage);
 	P_CheckSplash(self, distance << FRACBITS);
 
 	if (sourcenothrust)
diff --git a/wadsrc/static/actors/constants.txt b/wadsrc/static/actors/constants.txt
index c0ce68c04..9ccac908b 100644
--- a/wadsrc/static/actors/constants.txt
+++ b/wadsrc/static/actors/constants.txt
@@ -123,10 +123,15 @@ const int MSF_Standard = 0;
 const int MSF_Classic = 1;
 const int MSF_DontHurt = 2;
 
+// Flags for A_RadiusThrust
+const int RTF_AFFECTSOURCE = 1;
+const int RTF_NOIMPACTDAMAGE = 2;
+
 // Flags for A_Blast
 const int BF_USEAMMO = 1;
 const int BF_DONTWARN = 2;
 const int BF_AFFECTBOSSES = 4;
+const int BF_NOIMPACTDAMAGE = 8;
 
 // Flags for A_SeekerMissile
 const int SMF_LOOK = 1;