My stupid friends

I have a couple friends who occasionally play "the knife game." I don't know how they got the idea, but it's the very definition of stupidity.

There are two ways to play. Both of them involve tossing a knife to each other, at which time the person hopefully catches it by the handle.

Version 1) You toss the knife until someone bleeds.

Version 2) You toss the knife until someone catches it three times in a row.

There is a third version that ends with me calling the hospital and later a friend's parents with an embarrassing explanation. They haven't played that version yet, but only by luck.