Click and hold for the angle, then release for the power.
You can then hit the poor guy again when he's in the air but clicking. When 'Aerial' is red, you'll hit him up, when it's blue you'll hit him down.
S.
The same goes for me. I'm still hoping somebody will spot me and post in 'was it you'.....
The only member I've seen was the yellow IS in centre parcs. (gold member sticker in the window.)
S.