Jacknife

Tricking's double-kick showpiece: a single cheat-setup jump that fires a round kick and then a hook kick before landing. The set and takeoff are the same as a 540 — leg and arms lifting together — with the total rotation of a cheat 720. The details that separate a real jacknife from a flailing one repeat across coaches: the first knee drives straight up for lift, the round kick snaps across like a roundhouse and retracts immediately, because a leg left hanging out freezes the hips and kills the spin — which is why thinking of it as a 540 with a bonus hook fails. After the round, the head whips hard toward the twisting side to find the target for the hook, the arms keep pulling in through the turn instead of countering, and the hips turn fully over so the hook comes out open rather than as a lazy crescent. Every tutorial gives the same quality rule: a bad kick travels up the progression line, so the tornado, narabong, 540 and cheat 720 each need to look right on their own first.