To further add the issues this presents, think about this scenario. So you are trailing this driver who is driving a similar car to yourself, so you are slowly gaining boost but aren't ready to use it yet. You are getting close to fragging him/her when all of a sudden this driver stopped and in the resulting collision you stop, and the rest of the pack overtakes you. Or you try to swerve out of the way, crash into a building and lose repair points or even worse, your car. It sucks, and unfortunately it happens because of two things. The spirit racers may have collided with vehicles in other races, the races that they were recorded in, but the other racers don't show up in your race, so you don't know when a car is going to suddenly spiral out of control. Also, the other drivers are really heavy, and tend to push your car around like a pinball. Just some things to think about.