When you race, time trial, circuit, etc., when you are starting to do a u-turn, turn right, but don't do a right u-turn, you see bunch of rocks in your way. Do a huge bunny hop over the rocks and you skip 2 u-turns and shorten your time.

do a bunny hop hit the ramp and dive down and then when you are under water push up.

At the options menu, hold R2 and press up, up, down, down, left, right, left, right, square, O, square, O. A secret Cheats screen will appear. Enter any of the following codes:

AllOutAI - Tougher opponents
Hobble - Easier opponents
IBelieve - Race against a UFO in Time Trials
F18 - Race an F-18 in Time Trials
AllChar - Unlock all Characters
Festival - Unlock all video's

Cheat mode
At main menu, choose "Options" . At the options menu, Hold R2 and quickly press Up(2), Down(2), Left, Right, Left, Right, Square, Circle, Square, Circle. To confirm correct code entry the Cheat Name screen will appear . Enter one of the following case-sensitive codes (below) then press X to exit back to the options screen. When you begin your game the cheat codes will take effect.

Expert AI
Submit AllOutAI as a case-sensitive code. The AI will run the best race possible on all courses. Note This is already active by default under the hard difficulty setting.

All ending FMV sequences
Submit Festival as a case-sensitive code.

Play Time Trials against a UFO
Submit IBelieve as a case-sensitive code.

Play Time Trials against a miniature F-18 jet
Submit F18 as a case-sensitive code.

Play Time Trials against ghost of currently selected player
Submit SEADOO as a case-sensitive code. Remember this is the default in the game.

Cannot get knocked off
Submit TopBird as a case-sensitive code. The computer can't knock you off your SeaDoo, but you can still knock the computer off his SeaDoo.

Hard tracks with normal AI settings
Submit Hobble as a case-sensitive code.

Maximum performance meter
Submit PMeterGo as a case-sensitive code. Remember If you miss a buoy you will stall with this code on.

All courses
Submit Passport as a case-sensitive code. Remember This also unlocks Steve. Note This also unlocks the Bermuda Triangle.

All characters
Submit AllChar as a case-sensitive code. Remember This also unlocks Steve.

All wetsuits
Submit LaPinata as a case-sensitive code.