WHILE LOADING EXPLOSIVES BY HAND ONTO TRACTOR- EE HANDED A FULL BOX OF EXPLOSIVES UP OVER THE SIDE OF CARGO COMPARTMENT OF TRACTOR TO CO-WORKER. EE FELT A SHARP PAIN IN HIS NECK & RIGHT SHOULDER WHEN LIFTING ARMS CHEST HIGH. THE PAIN WAS OFF & ON THE REST OF THE SHIFT. NOTE: REVISITED DR ON 5/21/04 & RECEIVED WORK RESTRICTIONS.