FUEL DOCK ATTENDANT INJURED HIS KNEE WHILE ATTEMPTING TO HOOK AN OIL HOSE TO THE 122 HAUL TRUCK. AS HE WAS PUSHING UP, HIS RT. KNEE GAVE OUT. HIS RT. FOOT WAS IN MUD & WATER. HE DID NOT FALL DOWN, BUT IT DID POP TWICE. TAKEN TO E.R., RETURNED TO WORK 5/23/05.