I was involved in a heavy session (musical) last night in our local dive.About 6 guys with acoustics,me on acoustic bass,and during a pretty vigorous version of the Small Faces 'Sha la la la lee',my right hand suddenly,for want of a better word,seized.I could not get my fingers to do what I wanted.No pain whatsoever,but it was as if I had no control.At one point my index and 2nd fingers curled up and I couldn't uncurl them.This lasted about a minute and then was fine,but for the rest of the night,I felt as if it was just about to happen again.One of the guys said it was because of my forearm resting on the sharp edge of the bass,which it was,and could have been causing some sort of nerve or muscle problem.
Anybody ever had this?Didn't like it,by the way!