Taking tilt cylinder pin out from eye where it attaches to head frame. Took bucket off, backed scoop up, had head frame tilted forward. Pin still in the cylinder eye and one side of bracket. Scoop was shut off. Coworker exiting scoop and heard the head frame hit the ground. Coworker went to front of scoop and saw IEs foot was under the head frame. IE had 3 fx'd bones in foot.