A buddy of mine once put a pizza in the oven and then went out back to smoke a joint.

Needless to say, he started doing yardwork and forgot about the pizza in the oven. The next thing he knew, the Fire Department was knocking at his door.

I think you're a real pothead when you forget about FOOD that's cooking in the oven, because food is one of the main things you focus on after a smoke session.