beefed it this morning off the mini ramp and went straight to the asphalt. now my arm feels numb and super heavy, slow moving, uncomfortable feeling like ive been squeezing it for a while. i didnt fall on my arm though, at least i dont recall. seemed more to fall straight on my chest. if i hold my arm above my head its extreeemely hard to move, not broken bone hard, but no muscle hard. what could be the problem here?