I can beat that one. I used to work with a guy that if you messed with him when he was mad he would threaten to "stab ya" and once he left a pocket screwdriver in a guys leg at work. On such a day I decided to press my luck and he warned me I was going to get stabbed. I pressed the issue and was stabbed with a glazed doughnut.
The trick was to see what he had in his hands when he got mad.