Race car drivers often hold grudges and seek retribution when they are wrecked by another driver. This usually happens after the race when the drivers are not on the track.
At Bowman Gray Stadium in Winston-Salem, North Carolina, driver Derek Stoltz knocked out Bryant Robertson and later knocked out Bryant's brother Mike.
A very angry Mike approached Stoltz's car, and as Stoltz started to drive away, Robertson grabbed onto his car window. The plan greatly backfired as Robertson was flung into a wall after he lost his grip on the car. He then got up and continued to chase the car until being stopped by a security truck.