Uhhh...theyre not too bad. The Vette and CTS are on the "performance" course where you ride w/ an instructor kinda guy. He just says not to do any burnouts or powershifts. But other than that anything goes really. The rest of the cars are on the "passenger" course, which has no instructors. But before you start they tell you not to make the wheels spin at any time or go over 25mph. They were pretty lax on both of those rules. The only time they said anything to me was my last run when I kicked the tail of the GTO out like 3-4 times. The guy just said that I should watch my speed or they'd kick me. But that was the only word they said to me and I drove every car past 25mph and spun some tires.