I've had one. One time me and some friends were playing AnD and one of them was testing what the DM would allow crafted. "Can I try to craft Doritos?" DM agrees on it as a Nat 20. He gets it. He got bonus XP for that.

It was made funnier since then my chara tried one and I had to roll a save in case of allergies or whatever. I got a 4. DM made my chara jizz in his pants from sheer deliciousness. XD