View Single Post
Old 12-15-2011, 11:43 PM   #13
Slipknot
Super Moderator
iTrader: (0)
 
Slipknot's Avatar
 
Join Date: Aug 2000
Location: Middleboro MA
Posts: 17,125
it is some kind of muscle spasm
happens to my arms and shoulders quite often
sometimes you can see it also
must be some kind of short circuit
Slipknot is offline   Reply With Quote