since I was young I can remember being able to "dislocate" my shoulders, except it's not really a full dislocation. Well, now sometimes when I'm lifting it "pops out". Yesterday I was doing db incline press and at extension it gave out almost dropping the dumbbell on me. The same thing's happened before when doing tricep extensions, but it ended up with my arm basically being folded behind my head until I dropped the weight. I've done some reading and found out it may be due to shoulder subluxation, but that doesn't seem to match my symptoms that well. Anyone ever heard of this before? Any recommendations on exercises to strengthen my presumedly weak rotator cuff?