okay it started like 2-3 days ago, my left bicep randomly starts to pulsate, looks like something is moving violently in it. its weird i think ive had it happen to me if i do some physical strenuous work, but it just appeared randomly. it moved about 1/16 inch out or so, and can even be seen >_<. i was wondering if this has happened to anyone. its getting really annoying sometimes so i punch it...