Ya, he takes off with his back hand on the handle instead of his front hand (as in a whirly). He pre-spins so that his front hand is now on the handle like normal, so it becomes a sort of sloppy switch whirlybird. I think.
its pretty much a mobe 5 looking trick, i think ive heard somewhere of like a squirrley bird?? or something that sounded like that, but it looks like a really messed up backmobe 5