OK, maybe I won't do it again.....I'd hate to break my son's armA true story about arm wrestling.
A colleague's 25 year old son was arm wrestling for fun about 12 months ago. He broke the large bone in his upper arm. He's had surgery 3 times and still doesn't have 100% use of his arm. It's getting there but it's a long haul. There was a point where the specialist advised he may lose quite a lot of use. :-(