From ebgames.com:

Experience the drive of your life in Flat Out as you throw yourself around 45 challenging tracks in one of 16 fully upgradeable cars. The track environment is subject to an advanced physics system unique to this game, and is set to define a new standard in racing games. Fences will shatter, tyre walls will explode, water tanks and barrels will fly across the track into other cars. Every time you lose control, you will truly feel the weight of the car as it collides with and destroys a barn, or smashes into the pack of cars ahead of you, and with 40 deformable pieces on every car sparks are guaranteed to fly.