EE SQUATTED DOWN TO PICKUP A 20-25 LB. PIECE OF CHANNEL ABOUT 2' LONG & STRAINED HIS BACK. THIS WAS ORGINALLY TREATED AS A REOCCURRENCE OF A PREVIOUS INJURY, BUT LATER WAS DETERMINED TO BE A N EW INJURY BY THE TREATING PHYSICIAN BECAUSE THE STRAIN OCCURRED IN THE THORACIC REGION OF THE SPINE VERSUS THE LUMBAR FOR WHICH HE AS RECEIVING CHIROPRATIC TREATMENT AT THE TIME.