EE HAD JUST WALKED OVER TO THE IMPACTOR FROM CHANGING A SCREEN WHEN CO-WORKER ASKED EE TO PULL THE SAFETY PIN SO HE COULD ROTATE THE BARS. WHEN HE PULLED THE PIN THE SHAFT STARTED TO ROTATE & CO-WORKER WAS STANDING ON IT. EE REACHED UP TO STOP THE ROTATION WHEN HE GOT HIS FINGER CAUGHT BETWEEN THE BAR & FRAME.