Denny Hamlin threw his HANS Device at Kevin Harvick during the race.
NASCAR recently implemented a new set of rules, forbidding drivers from approaching other cars after crashing out of the race. Denny Hamlin put this new policy to the test at Bristol, a track notorious for on-track confrontations.
The rule specifically states, "drivers cannot walk onto the track or toward another car." Hamlin stayed a good distance away from his target (Kevin Harvick) and on the apron with safety workers, but he still walked towards the No. 4 machine before chucking his HANS Device at it.
Hamlin was infuriated because Harvick had turned him while he led the race in the early going. The two do have a history that dates back to at least 2010. In fact, the duo got into it in this very race one year again. NASCAR spokesperson Kerry Tharp told the media that penalties are unlikely to be handed down following the incident.
Harvick later took full blame for the incident.