It's very possible Tony Stewart raced his last race, as he ran over a fellow driver and killed him.

Via Weird World on YouTube

Let the debate begin. Did Tony Stewart "gun it" at a driver who was out of the car and looking to pick a fight with Stewart? Tony and the driver bumped the lap before ending in the driver being wrecked. That driver, Kevin Ward, then got out of his car and was waiting for Tony to circle around again under caution. What happened next is what will be debated, and possibly be discussed in court.