EE was spot bolting in #3 entry. He had his hand on the joystick & his right hand on the bolt. He said he was straightening the bolt to go in the chuck. His hand was between the plate & roof bolt when he engaged the joystick. His metacarpal glove caught the plate & twisted his arm with it. He was taken to CAMC where surgery was performed on 8/18/10. Bolt was a 4' resin.