I played my first gig with a big band the other night. Everything went pretty well considering I've very limited experience on playing out with the upright. However, during the last set we were playing an uptempo swing number ("Sing, Sing,Sing") and first my left hand then my right hand froze up on me. At first I thought I was having a stroke cause the hand curled and I had no control over it. After shaking it out, the same thing happened to the right hand. I guess my question is: Anybody ever had a similar experience? I'm chalking it up to fatigue because the next night I played a four hour gig (on electric) and had no problems. I'm just interested in others experiences.....it was pretty frightening.