I worked at a local KFC as a cashier, and the customers never did anything weird. But one day, a drive thru employee came in late for his shift and put a backpack down. I didn't think anything of it, until he pulled out a mannequin hand  and threw it in the deep fat fryer for about 15 seconds. He then pulled the mannequin hand out band started trying to eat it. That was the last day he showed up to work.