got a few questions on why Geoffrey Bodine was penalized, the answer from the Power Team site: An incident with an air gun has cost Geoffrey Bodine and the #60 Power Team Chevy team a lap in the Pepsi 400 at the Michigan Speedway. On the teams second pit stop of the day, an air gun malfunctioned during the stop. A substitute air gun was used to finish the stop, which brought a 15-second penalty from race officials. NASCAR rules only allow two air guns to be used during a pit stop( PowerTeam Site )
