The Knife Game, aka Five Finger Fillet, is played by placing your hand palm down on the table then stabbing the space between your spread fingers with a knife, back and forth until you quit or stab yourself.
It's the kind of game typically played by the really drunk, really high or really reckless, because their state of mind makes losing a finger seem like an equal trade off for looking cool.
But the guy in this video by Irfon Automation isn't playing to look cool- he's using Five Finger Fillet to demonstrate the Staubli TX40 robot's incredible speed, precision and programming. And he's so confident the bot will stay on point he's willing to risk losing a finger to prove it.
-Via Laughing Squid