OPERATOR WAS ATTEMPTED TO DRILL STARTER HOLE. WHEN HE ENGAGED ROTATION HIS GLOVE GOT CAUGHT BETWEEN POT AND DRILL STEEL. THIS RESULTED IN TORN LIGAMENTS IN HIS RIGHT THUMB. EE WORKED UP TO VAC ATION 12/21/01 AND DID NOT RETURN TO WORK AFTER VAC 1/2/02 DUE TO INJURY.