WHEN EXITING THE CHANGE BLDG. HE FELT SOME PAIN IN HIS LEFT KNEE. HE CONTINUED TO WORK UNTIL 5-16 AT WHICH TIME HE SAW A DR. THE DR. REFERRED HIM TO AN ORTHOPEDIST. EE WAS SEEN BY DR. ON 5-24 & WAS DIAGNOSED WITH A HYPEREXTENDED KNEE RULING OUT ANY CARTILAGE OR LIGAMENT DAMAGE. HE RETURNED TO WORK ON 5-31.