Why don't I show any symptoms to a dislocated shoulder?

I was playing basketball and tried to steal the ball, but my shoulder went back and just popped out. It hurt like crazy so I just clutched it, popped it back in place, and continued to play. At first it was hard to move, but I had to suck it up. Other than pain, I don't show any symptoms like bruising or swelling. Can someone tell me what's up?