Really?

I can understand getting angry while skateboarding. Anyone who has ever skateboarded with me can attest to that. The problem with this guy is that he's getting angry, but it appears as if he can't even do a noseslide. I always hated when people would try harder tricks than they can do and either get mad or say some shit like "Oh man I was nailing that trick yesterday". There's no shame in learning, everyone does it. I'm just not sure why he's mad, because he can't do the trick or because he isn't landing it?