Don't watch if things like sudden bone snaps aren't your thing..
http://www.towleroad.com/2009/07/mans-arm-snaps-in-half-at-armwrestling-tournament.html
That is a scary video.
That's also an ahhh... interesting website. I've never heard of it or visited it.
Not that there anything wrong with that.
LOL - that's facebook for ya.. had no idea what you meant until I went back. to each their own I suppose!