I was doing pull ups today(I started doing them just recently), and was in the middle of a rather demanding pull when I got a forceful tingling in my arm. It wasn't precisely painful, but it was demanding of my attention, as if someone where calling my name from 6 inches away. The best way I can describe it is it was like a few tiny rubber bands snapping(that's what it felt like inside my right arm). I have had no pain or discomfort in my right arm in the 7 hours since then. Any idea what it could have been?