A couple months ago I was working out, doing chest flys on a bench, and on the decline I happened to have a sneeze
attack which made my shoulder
twitch, feeling like something has ripped,and
ever since than it feels like my left shoulder is slightly dislocated.
By this, I mean that if I leave my arm limp, I am able to use my other hand and, what seems is that I am able to push the top of my arm back into the shoulder socket.