A firefighter surveys the damage after a shed fire. The shed was destroyed at about 5:45 p.m. yesterday at a trailer park behind Sheetz, 1781 N. Atherton St. The fire damaged the back of the trailer, but there was neither interior damage to the trailer nor injuries. The owner, George Bathhurst, was working on a motorcycle in the shed when it exploded. Alpha Fire Co. Assistant Fire Chief James Brown said it took 10 to 15 minutes to extinguish the flames. The fire is under investigation.