Man snowboard cross is insane!
I can't get over all the flailing arms on the big jumps. Even the best riders with the cleanest runs seem to flail a ton.
I will say though that it seems to have way more luck than the rest of the snowboard disciplines. Even the gold medal winner Vaultier, who was also the most recent world champ, and overall seemed to be the most in control of all his races, was essentially lucky to get through to the final (the back 4 wiped out, and he was the only one of them to really recover, allowing him to nab the final spot).