If you're ride motorcycles, you'll know it can get pretty hairy when you're in built-up areas.
This video, which was taken in California, begins when a rider admonishes a driver for using his phone at a set of traffic lights.
He takes off and, as you'll see in the video, finds the driver getting pretty close behind.
Soon enough, the driver behind him knocks him off his bike and speeds away.
Take a look. NSFW language, by the way.
The rider has since tried to sue the driver for his actions, although under Californian law, he's unable to do so as the driver's currently in the middle of a criminal investigation.
Which makes sense, considering the way he drives.
Some people, eh?