EE WAS ON THE OPPOSITE OF THE OPERATOR SIDE OF A DOUBLE BOOM. THE OPERATOR WAS HAVING TROUBLE ADVANCING THE BOOM DUE TO AN UNEVEN BOTTOM. THE OPERATOR STOPPED THE BOOM AND THE EMPLOYEE STEPPED IN BETWEEN THE WHEELS TO GET SOME NAILS. WHEN THE OPERATOR BACKED UP, HE RAN OVER EMPLOYEE'S FOOT, DISLOCATING HIS ANKLE AND KNOCKED HIM DOWN CAUSING A FRACTURE TO FOREARM.