EE WAS ATTEMPTING TO ROLL TARP ON A SEMI PUT TRAILER WHEN TARP HANDLE BECAME DISCONNECTED & EE FELL BACKWARDS LAND ON HIS BACK. HE WAS STANDING ON HARD CONCRETE FLOOR WHEN HE FELL. HE INJ HIS LOWER BACK & HAD A SHOOTING PAIN IN HIS LEFT LEG. THE HOSP HAS SCHEDULED HIM FOR AN MRI HE WILL NOT RETURN TO WORK UNTIL WE GET RESULTS OF MRI & HAS FULL DRS RELEASE.