does this fix it

code/modules/reagents/chemistry/recipes/pyrotechnics.dm

@@ -58,6 +58,7 @@
 	required_reagents = list(/datum/reagent/water/holywater = 1, /datum/reagent/potassium = 1)
 
 /datum/chemical_reaction/reagent_explosion/potassium_explosion/holyboom/on_reaction(datum/reagents/holder, multiplier)
+	set waitfor = FALSE
 	var/turf/T = get_turf(holder.my_atom)
 	if(multiplier >= 150)
 		playsound(get_turf(holder.my_atom), 'sound/effects/pray.ogg', 80, 0, round(multiplier/48))
@@ -430,6 +431,7 @@
 	var/zap_flags = ZAP_MOB_DAMAGE | ZAP_OBJ_DAMAGE | ZAP_MOB_STUN
 
 /datum/chemical_reaction/reagent_explosion/teslium_lightning/on_reaction(datum/reagents/holder, multiplier)
+	set waitfor = FALSE
 	var/T1 = multiplier * 20		//100 units : Zap 3 times, with powers 2000/5000/12000. Tesla revolvers have a power of 10000 for comparison.
 	var/T2 = multiplier * 50
 	var/T3 = multiplier * 120

code/modules/reagents/chemistry/recipes/slime_extracts.dm

@@ -570,6 +570,7 @@
 	required_other = TRUE
 
 /datum/chemical_reaction/slime/slimestop/on_reaction(datum/reagents/holder)
+	set waitfor = FALSE
 	sleep(50)
 	var/obj/item/slime_extract/sepia/extract = holder.my_atom
 	var/turf/T = get_turf(holder.my_atom)