hulk jumps
Okay I thought this was pretty cool...First enter the moon gravity cheat (getitup) and then go anywere of choice and turn it on (pause,options,cheats). Next go up to any building- preferibly a tall one- and jump on the wall. Continue to press X and eventually you will reach the top.... Try it....
More tricks, tips and cheats for this game are right here - Tony Hawk's Underground cheats
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