EE WAS AT THE PROPANE SYSTEM STARTING IT UP, WALKING BARK AND FORTH FROM ONE LOCATION TO ANOTHER WHILE WORKING. EE WALKED INTO A PIPE TWICE, STRIKING IT WITH HIS HARD HAT, WHICH JARRED HIS NEC K. EE HAS EXPERIENCED CONTINUED PAIN IN HIS NECK, SHOULDR, AND SPINE. SAW COMPANY PHYSICIAN ON 2/7/2000.