So why BBQ instead of just throwing your pie in the oven? Well, as Professor Patxi explains it, the moisture produced when you're cooking a pizza in the oven has no where to escape, so it sogs out some of the pizza and in particular the crust. The BBQ, conversely, lets that moisture escape, giving you a super-legit pizzaiolo-caliber pie rim. Also: you look like a badass BBQing a pizza. Also also: the not-cleaning-up-anything thing!