EE STATED THAT HE WAS GETTING INTO THE LOADER CAB. HE HAD OPENED THE DOOR AND WAS REACHING IN TO GET A BROOM SO AS TO SWEEPOUT THE CAB. AS HE WAS STRETCHING/TWISTING, HE FELT A PULLING SENSATI ON IN HIS LOWER BACK/LEFT SIDE AREA. REPORTABLE DUE TO MISSING ONE WORK SHIFT ON 8-9-03.