EE WAS WORKING ON SLOPED ROOF DECK IN HARNESS GEAR. HE SLIPPED ON METAL DECK SURFACE & HARNESSLINE PULLED HIM & STRAINED HIS BACK. EE HAD PAININ BACK & UPPER TORSO AREA OF THE BACK, BUT PAIN DID NOT CAUSE HIM UNDUE DISCOMFORT SUCH THAT HE COULDN'T SIT OR STAND, BUT RATHER PAIN WAS A MILD DISCOMFORT. DID NOT CAUSE HIM UNDUE DISCOMFORT SUCH THAT HE COULDN'T SIT OR STAND, BUT RATHER P