EE HAD INJURED HIS KNEE FALLING ON ICE AT HOME THIS WINTER. THE KNEE CONTINUES TO BOTHER HIM, BUT HE WAS PERMITTED TO RETURN TO WORK. HE REQUESTED OF HIS SUPERVISOR TO TAKE HIM HOME AS HIS KNEE WAS ACHING. WHEN HE STEPPED UP INTO SUPERVISOR'S PICK-UP HIS KNEE BUCKLED UNDER HIM.