GTA 4 Carmageddon
Open map games are some of the most entertaining games to play because of the constant variables and situations. Well, apparently there is a small hack, or manipulation of code, in the Grand Theft Auto 4 game that changes some of those variables even more. It literally releases the physics on the vehicles in the game, making it very very interesting. Long story short, according to the poster you can do this by finding your handling.dat file in your GTA4 folder, and edit "wbias" to be around -9 for each car.