Ambush drive causes greet_progs to fire

You step out from your cover. Your surprise attack === OBLITERATES === a duergar! You drive a duergar out of here with your ambush! A Rocky Path [Exits: north west] A palm-sized orange fungus lies here. A duergar glances at you suspiciously as he passes by. You yell 'Help! I'm being attacked by a duergar!' A duergar is covered with bleeding wounds. --- You step out from your cover. Your surprise attack MANGLES King Grenlath! You drive King Grenlath out of here with your ambush! The Private Chambers [Exits: east south] (White Aura) A huge duergar dressed in dark armor is here, sitting on his throne. King Grenlath yells 'Intruder in the Palace!' A palace guard rushes up and attacks you! A palace guard rushes up and attacks you!