3 FOOT ALUMINUM STEP LADDER WAS BEING USED TO REACH SPAD IN ROOF. LADDER WAS PLACED ON UNEVEN PAVEMENT AND FOLDED. EMPLOYEE GRABBED THE LADDER TO BALANCE HIMSELF. THE LADDER CONTINUED TO FOLD AND THE EMPLOYEE FELL ON TOP OF THE LADDER WITH FINGER IN A PINCH POINT CAUSING CRUSHING INJURY AND DISTAL FRACTURE OF HIS MIDDLE FINGER OF HIS RIGHT HAND.