cosco's was cool, and so was jon's, but they shouldn't have won. Think about what you are saying. Spin to win is one thing, but not spiining at all is another, something in the middle should win
he did it because he already fucked up one of his landings so he wasn't gonna do anything with that run anyway. Plus it didn't look like he had enough speed for the kangaroo flip.
my guess is something was wrong, lack of speed or maybe he just wasn't feeling it because Jon's not the type of person who would try to make a statement in the same manner Cosco did.