Collect a power-up, then leave that location and return. The power-up will reappear and may be collected again. Note: The maximum number of nitros that may be collected is five.
Lose the police
When chased by the police, you can cut them off by hitting them on the back when they try to cut you off.
Play any Episode/Scene
Complete the game, then save to a memory card. Load the saved game from the options/memory card screen to chose any episode and scene. Chose quit to the main menu and save the game again at the options/memory card screen.