Tony Hawk's Underground 2 Cheats :
Secret - Blow stuff up
During the 'Boston' level in THU2 go through the trash can that is on fire and grind over both the cannons opposite the construction site they will fire and the construction site will fall.
In the triangle find the crashed helicopter with the missiles and grind the missile it will blow up half the mountain range
Hope this helped
Sorry, to fulfil this action you have to be CheatsGuru User