Right, I know how to perform a hammerhead, what I'm wondering is: what is the wing-over at the top considered, considering that there are 4 basic manuvers (loop, roll, straight line, spin). Would it be considered a 1/2 loop (even though it is done on the yaw axis, it is still a half circle) or would it be considered a 1/2 spin?

I'm guessing Spin, but I'm no expert.