After the race was over, Brad Keselowski tagged the back of Denny Hamlin's car under yellow -- or the cool-down lap. He also apparently got into Matt Kenseth, another Joe Gibbs Racing driver.
As the cars were making their way down pit road, Keselowski tapped the back of Tony Stewart, who retaliated by throwing it in reverse and slamming into the No. 2 Ford.
Keselowski and Hamlin drove into and through the garage area, stopping short of the haulers. Hamlin, clearly furious as he climbed from his car, had to be restrained from going after Keselowski by crew members and NASCAR officials.
Read More here....USA Today