I was at a pizza restaurant once, saw the guy mess up getting the pizza out of the oven, it ended up on the floor... a quick glance around to make sure no one was watching (he missed me) and it went back into the oven.
That part was a high traffic area because it was between the front of house and rear kitchen, so the floor would have been pretty dusty and grimy.
At least he cooked it a bit longer!
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