In case you had to ask.
It might sound obvious, but when you ride in a car on the race track, you should probably consider wearing a helmet. That goes double if your weapon of choice is an open top sports car. The passenger in this Dodge Viper had to learn this the hard way, when the driver experienced a moment of understeer at the Nurburgring. Thankfully, the Viper wasn't being pushed to its full 500-hp limit, but the impact was severe enough to smash the guy's head into the side window with plenty of force.
Unless he has a death wish and/or he is a moron, he won't be making that mistake again.