The Red Bull X-Fighters’ ABC of tricks:

BACKFLIP

By doing a Backflip, the rider makes an entire rotation along his vertical-axis. (picture 1)

FENDER GRAB

The rider bends over the handlebars and grabs the fender with both hands. Maximum points are scored when the rider puts his helmet against the fender and the bike is pointed straight up and down. Riders may also choose to perform a "fender grab" with the back fender.

CORDOVA

Hand on the grips, the rider brings his feet up underneath the bars, presses his knees to his chest, then contorts his back so that he's looking - upside down - out over the back fender. One of the more bizarre looking tricks on the circuit. (picture 2)

360

For the 360 the rider carves off the ramp as if he is going to whip the bike. At the apex of the ramp the rider pulls back on the bars and looks over the left shoulder.
The head position is the biggest difference in the execution of the 360 versus the backflip. As the bike leaves the jump, it follows the direction of the riders head and rotates in a flat spin.
When the bike is past 270 degrees of rotation, the rider spots the landing and takes the bike from a flat spin into an up-right position (similar to the second part of a backflip). (picture 3)

HART ATTACK

The "heart attack" named after the Cray Hart the first rider to do the trick is performed with both legs pointing straight up in the air. One hand is positioned like a hand-sand on the seat while the other holds onto one of the grab holes. If the rider's face is facing backwards then the trick is called "Lookback Hart Attack".