Only happened once, but it was epic! Sort of like poor Jon's slip & slide adventure with the whole pie! The crust stuck and I jammed real hard with the peel, only to watch the cheese and topping slide half-way off the pizza onto the peel. Fortunately, I was able to get the crust off on the next jab and reconstruct the pizza back in the kitchen. Not the prettiest pie ever made, but at least I got to eat mine, unlike Jon!