EMPLOYEE HAD JUST CLEANED A MATERIAL SPILLAGE INTO BOBCAT BUCKET. EMPLOYEE HAD ALREADY CLIMBED ONTO BOBCAT, BUT AS EE TURNED TO SIT INTO THE CAB OF THE BOBCAT, EE'S FOOT SLIPPED OFF OF STEP AND WEDGED BETWEEN BOBCAT BUCKET AND FRAME OF BOBCAT CAUSING EE'S RIGHT FOOT TO TWIST.