This is that C4 finisher he did in all those videos, right (backflip uranage)? Do you think they'll let him use that as his finisher? Hell, I'd settle for the SSSP.
He's used it a lot of times on Velocity.
It doesn't look as pimp as it does in those videos, because Birchall doesn't look as big in WWE, but it fits well as a WWE finisher.