Marcos Ambrose and Casey Mears finished the Toyota Owners 400 in 18th and 19th place, respectively, and swapped some paint on the way there. So, after the race, they duked it out in the garage. Mears attempts to push Ambrose and he responds with a right hook to Mears's face.
The end of this race was pretty wild in general. Matt Kenseth, Jeff Gordon, and Brad Keselowski all bumped and scraped past each other and switched position throughout the final five laps and Keselowski also looked ready for a fight after the race. He went over to Kenseth's car after the race and started pointing and gesturing his displeasure with their late contact.
While all this was going on, Joey Logano was able to sidestep it all and finish in first place.