It came from the D&D game

So the GM is describing the swampy valley we're about to walk down into, and he says, just at the limit of our vision is a black ziggurat (step-pyramid), where the, well, quest item (a sacred tablet for a tribe of shifters) is supposed to be. To get to it, we're going to have to slog through swamps, probably fight off lizardmen and undead.

I immediately pipe up with "Okay, so when we get there, I have a plan. We'll set the place on fire, and then we can just search through the ashes. But I have to warn you, this plan has some danger to it.

"Everyone knows that smoking ziggurats can kill you."