This is how to break the AI cars and make them spin around. 1. Go to Options. 2. Go to Arcade Mode Settings and set the number of laps to more than 5 and the tire wear to Strong. 3. Exit the Options and go into Arcade Mode. 4. Select any track (not street or dirt tracks). Super Speedway, Nürburgring or Le Mans works best. 5. Select a GT1, LMP or Group C car. 6. In the Driving Options, set the tires to Super Soft. 7. Start the race in either A-Spec or B-Spec and enjoy! And here's a video.