The trick is best described for its grab. The frontside grab is with the rear hand between the bindings on the toe edge; in this particular maneuver the front leg is boned. It can also be any air performed on the frontside wall of the halfpipe.
a toeside grab with the trailing hand when a rider airs out of their toeside wall of the halfpipe
Any aerial trick performed on the frontside wall of the halfpipe.