When you go to Los Angeles, on the second shortcut, when you use full nitro speed, smash into the wall just after the curve. It might take a few tries. When you see that you suddenly popped to the normal track, you will see that you're screen is still blue, the way it is when you use full nitro. The only thing is that you are still traveling at normal speed. You now can hit any car without slowing down. The only way to get out of this mode is to do drift, a knockdown, or get wrecked. There is only one bad thing. You can't use nitro anymore. It is still a great cheat to try.