Airmat BS 540.

1. You should land BS360 consistently first.

   Ride into the jump on a gentle-to-medium slope at a steady moderate speed, fast enough not to stall. A BS540 turns one and a half times to your backside, so it needs a bit more speed and height than a 360.

2. Just before the lip, set your eyes slightly forward in your direction of travel, flex both knees lightly, and press the whole board into the snow to load the pop.

3. At the lip, extend both legs at the same time and pop straight up, not forward.

   The extra height buys you more time to spin.

4. At that same instant, pull your trailing shoulder (right shoulder for a regular rider) hard backward and lead with your head and eyes in the same direction.

   All of your spinning momentum is set at takeoff and cannot be added in the air, so make this lead big.

5. Once airborne, pull both knees toward your chest and tuck both arms in close.

   The tighter you make yourself, the faster you spin for the same momentum, so this is where the rotation really kicks in.

6. Past one full turn you enter a blind stretch where the landing is out of sight for a moment.

   Stay calm, keep sending your eyes the way you are turning, and hold the shoulder twist.

7. Just before one and a half turns, slowly open your tucked knees and arms.

   Spreading your limbs acts as a brake, so use it here to stop over-rotating and line up your direction.

8. Land both feet at once on the airmat in a switch stance (riding the opposite way).

   Bend your knees softly to absorb the impact.

You can pin your own clip to the tricks you've landed (My Video).