We're in the third season of NASCAR racing since the implementation of the "boys, have at it" policy at the start of 2010. And while drivers have done a better job of keeping themselves in check this year in the wake of Kyle Busch's run-in with Ron Hornaday at the end of last year, that hasn't stopped some tempers from flaring.
We've seen quite a bit of unrest, whether at the beginning of the season or the end. Just about everything from water bottles to helmets have gone flying. And when you're dealing with Kurt Busch, you don't have to be a race car driver for him to pick a fight with you.
Let's count down the top 10 run-ins over the course of the season so far: