EE WAS INSTALLING NEW MOTOR ON THE DREDGE USING A 5' PRYBAR TO ALIGN MOTOR TO THE MOTOR MOUNTS. PRYBAR SLIPPED, CAUSING EE TO LOSE HIS BALANCE, FALLING BACKWARDS 6' DOWN, HITTING LEFT SIDE OF BODY. HE FELL BETWEEN THE PONTOON AND LADDER, BRUISING LEFT SIDE OF HIS BODY AND RECEIVED A BROKEN RIGHT MIDDLE FINGER AND TORN NAIL BED ON RIGHT MIDDLE FINGER.