A 2003 model Honda Civic’s airbag exploded and a piece of metal shot out from the bag into the driver’s neck, according to police and hospital reports. The National Highway Traffic Safety Administration said it has not yet been confirmed that the accident involved an airbag rupture. “If it is confirmed that this is another rupture, then it would simply reinforce the reasons that we are working so hard to get these air bags remedied as quickly as we can,” NHTSA communications director Gordon Trowbridge said.