Don't you hate it when you take a sharp turn, or someone hits you and your car starts to roll and eventually ends up on its back? I have an answer to solve your problem. When your car is rolling use the left analog stick, or whatever you use for steering, and push it the way the car is rolling for it to roll faster and have a beter chance of it stopping upside down. If you want to stop it from rolling, simply the opposite direction. For you cheaters our there, enter this cheat code: R1 L1 R2 L1 left R1 R1 triangle. With this, you can even flip your car back over when it has completely stopped upside down. The cheat is the car hop cheat, or better control cheat, same thing.