Wildest one I’ve seen in person was being in attendance at a streetball tourney in the late-90s. One of the dunk contest contestants had a shoulder issue and needed his friends to re-align his shoulder twice. We were all cringing in the crowd. “It ain’t worth it, man” - haha.
My younger bro also had a shoulder issue wherein it kept dislocating from sports. He had surgery on it before 12 or 13yo. Related to ligament or tendon, etc.