Gnarly Tricks:
*Note These tricks can be done in any game mode. (Hint) Stunt is R2.

Can Can(with one Leg)   Stunt + Square
Can Can(with two legs)  Stunt + X
No Hander               Stunt + Down + L1
Nac Nac(very sweet)     Stunt + L1
Superman                Stunt + Left + Square
Recliner                Stunt + Down + X
Cliff Hanger            Stunt + Right + X
Rodeo                   Stunt + R1
Backflip                Stunt + Up + Triangle 
Toe Clip                Stunt + R1 + Up
Surfer                  Stunt + Down + Square
Scorpion                Stunt + Up + X
time probe              Stunt + Up + L1 + Square *note works better if you push buttons at the same time

Thanks to Revolution reader Jon & Shane, David Bitterman & Jeremy!