EE WAS PREPARING AN AIRLINE SO HE COULD HOOK UP ONE OF THE AIR POWERED DEWATERING PUMPS. THE AIRLINE STILL HAD J HOOKS ATTACHED. ONE OF THE J HOOKS CAUGHT ON THE RIB MESH AS HE WAS WALKING, CA USING HIM TO FALL BACKWARD. HE STRUCK HIS THUMB ON THE PUMP BASKET AS HE FELL BACKWARD.