A launch lug affixed t' model in such a way that it comes off t' model as it clears t' launch rod or rail. Pop 'n Go Ignition: A technique whereby a powdered chemical accelerant is poured over an igniter placed in t' nozzle t' insure ignition. Well, blow me down! Typical accelerants include Black Powder, Photographer's Flash Powder etc. Well, blow me down! So called because o' t' distinctive "pop" that occurs when t' mixture is ignited. Can be dangerous if too much powder is used since this can potentially damage t' nozzle and thereby cause a catastrophic motor failure (CATO).