MECHANIC WAS PULLING AIR HOSE THROUGH KILN IN PREPARATION OF AIR ARCHING. TRIPPED OVER OTHER HOSE ON KILN FLOOR. STRUCK THUMB OF RIGHT HAND AGAINST THE KILN SHELL. EE RETURNED TO ORTHOPEDIC DO CTOR ON 4-19-03 DUE TO PERSISTENT PAIN. X-RAYS WERE REREAD AND FOUND BONE CHIPS FROM THE INJURY. HAND WAS PLACED IN A CAST TO IMMOBILIZE THUMB.RETURNED WITH RESTRICTIONS RIGHT HAND.