EE was unhooking an Add car cathead. EE placed EE's foot on the top of the cars push arm. EE's foot slipped off and was caught between the push arm and the flipper jack. EE quickly removed EE's foot and received a stretched tendon attached to a bone in the top of EE's foot. Medical evidence did not revealed injury until EE received an MRI and it was read (4/22/16).