Tony Hawk's Underground 2: World Destruction Tour Cheats

Glitch 1: In training, go to where the mini pool is and grind on the left hand side, Just as your about to hit the end, jump, do a pop-shovit and bail off of your board. You should be able to walk under Training.

Glitch 2: In Airport, at the first, turn around and go up to a corner of th doors, and pres Up+Circle. This glitch may take longer but you'll be able to walk outside of the airport.