I am OK with them doing that on an air strip or track but when they do that on a public highway thats not right. They endanger everyone . Imagine what a 450 pound object can do to a car when it's traveling at 160 mph. Because of Pinheads like that "cagers" put all bikers in the same stereotype and most resent those of us on two wheels.This could also contribute to there general lack of concern or respect for our safety.