When you are going up a hill, do a wheelie at the top.
Bonus Cars
At the Car Select screen, hold View 1 for the first four bonus cars, or View 2 for the other four.
Bonus Races
For three new tracks, hold any View button at the Race Selections creen. The races Hawaii, Africa and Australia will appear.
Change Car Color
At the Car Select screen, press View 3 to change your vehicle's colors.
Get Machine Guns
At the car selection screen, pick the hum-vee and start the race. If you press start during the game you will fire rapid machine guns.
Honk your Horn
While racing, press Start to honk your horn. The Humvee will fire it's machine gun if you do this.
Jump over Cars
To jump over a slower moving car or one coming at you, pull a wheelie right before you hit it. If you do it right you should still be pulling a wheelie when you hit the car you are jumping over and will not crash.
More Bonus Cars
At the car selection screen, hold view 1 and 3 to reveal even more cars.
Ride on Two Wheels
To race on two wheels, double-tap the gas while turning a corner.
Short Cut in Hawaii
Before the tunnel you'll see construction cones. Go through them on the forest side and it'll take you up a two-track and off a cliff. HAVE FUN!!
Shortcut in China
When racing in China, you will find a breaks in the sides of the wall. Hit the gas and cut your wheel. It will take you through the break in the wall and across a country road before rejoining the game ahead of your compitition.
Shortcut in New York
The shortcut through the Big Apple is on the third exit through a construction zone!
Side Flip
Do a wheelie while turning, then press in the opposite direction of your turn to flip on your side.
View Credits
To view the credits, press VIEW 1 and VIEW 3 simultaneously.
Wheelie and Turbo Boost
To pop a wheelie and gain some acceleration, double-tap the gas while driving.
If you're playing in Manual mode, you can also do this by switching from fourth gear to neutral and back.