I've done those thousands of times.
It's just called a backseated landing...and a fucked up jump. Landing on your tails.
If that sequence would be a straight air his position would look really bad. Sitting on the tails, not launching from the jump properly.
OK, it's a bit different thing when you hit the jump backwards. But still, wouldn't it be much better if he landed in the middle of the skis, not on his tips, leaning all the way uphill.
(I often wonder that with the park jumps too...if you compare "proper" landing forwards to what most people do switch --> aren't you supposed to land standing normallly, just stomp it...not letting your upper torso lean on the uphill. To me that looks like you're not in control)