How to Make a friend punch themselves with an arm wrestling prank

Arm wrestling is one of the simplest, safest ways for two people to decide who is the stronger of them. If you find yourself arm wrestling a rather slow person, try this prank on them! All you do is convince them to try the new form of arm wrestling shown in the video, then do as these fine gentlemen do. Have some ice on hand in case your victim really punches themselves hard.