While in the air, press the Right Analog-stick in the indicated direction(s) while the bike is in the indicated orientation to perform the corresponding trick:

Horizontal with Front Wheel Forward

Superman: Left
Coffin: Right
Proud Hero: Down
Rule: Left, Up
Dead Body: Left, Up, Right
Horizontal and Upside Down

Underdog: Right
Drill: Down
Slash: Down, Left
Vertical with Front Wheel Up

Going Up: Down
Going To Heaven: Down, Left
Kiss Of Death: Left, Up
Vertical with Front Wheel Down

Going To Hell: Up
Bow: Up, Right
Polevault: Right, Down