Our user asked: "On friday night I went out with a couple of friends to a place similar to Chuck E Cheese and stuff like that but for older kids. There they had this type of boxing where you would box with huge gloves and in an inflatable ring. So i started throwing punches at my friend and the first punch i threw i felt a sudden pop in my bicep. I felt this pop in the middle between my elbow and my shoulder. I have been using the RICE method and haven't been using my arm too much but the pain won't go away and i can't really move my arm in many directions. Any suggestions on what this could be? Thanks So Much"