Biffle's girlfriend in trouble with NASCAR.

One of the main talking points of the Samsung/RadioShack 500 weekend was the on-track collision between Kurt Busch and Greg Biffle followed by the off-track confrontation between the girlfriends of the two driver.

Shortly after Busch appeared to punt Biffle into the outside wall on the back straight of the 1.5-mile Texas Motor Speedway, Biffle's girlfriend Nicole Lunders exchanged heated words with Busch's fianc? Eva Bryan on top of Busch's #2 Penske Racing pit box.

Those actions resulted in Lunders receiving an official reprimand from NASCAR about her conduct on pit road for although there are no set rules regarding drivers wives and girlfriends, as they have passes allowing them to be in the pit road area during the races, they are treated as team members of the team for which their partner drives for.