A would be Super Bowl reveler thought he could fill a balloon with welding gas and blast it at a party, but instead it exploded in his car, busting out all the windows, bending doors outward, and pushing up the roof about a foot, Arapahoe County sheriff's deputies said Monday. Norman Frey, 46, of sheridan and an unidentified woman suffered possible shrapnel wounds and busted eardrums in the explosion Sunday as they drove to a Superbowl party, according to the sheriff's report. Frey faces a felony charge of possession, use or removal of explosives, which is punishable by 2 to 6 years in prison. Several people reported the explosion, but when the deputy arived, Frey and the woman had abandoned the vehicle. A passer-by had given them a ride home. A Deputy "discovered a white passenger vehicle with obvious signs of an explosion in the passenger compartment," according to the statement, adding the license plate led them directly to Frey's home. The balloon had been filled with acetylene, a flammable gas used in welding, and it had rolled across the back seat, possibly causing static electricity that ignited the gas, according to the sheriff's report.