i hurt mine wakeboarding, i took a pretty good wipe last summer and the doc said that my shoulder had some stretched soft tissue but nothing too serious. (i also cracked 2 ribs) well last week i took another good wipe and put a fracture in the very top of my humorus (arm bone with bicep on it) and im going to an orthopedic specialist tomorrow to see what to do with my shoulder--no conclusions yet but suspected r. cuff damage...not good 