I found this one google, although some of it is very funny i am sure most were hurt badly.
http://video.google.com/videoplay?docid=3681075838456975938&q=weight+lifting
the one with the cats on the guys crotch, and the kid hitting his dad while benching is so funny!!!
and these guys are just idiots…but so funny
http://video.google.com/videoplay?docid=2797991080639854733&q=weight+lifting