Some flying thing is broke

I'm not entirely sure what the combo is, it seems to have something to do with hitting fly right before you hit the ground (to get that sexah little dip before you perfectly land), but sometimes being a little too late (so crashing), then you can't fly anymore...whenever you hit fly, you get stuck in the flying-down-fast animation, and sort of skate along the ground. Hitting crouch on a hill seemed to do odd things too as well as doing the odd fly-skate animation thing. It's been happening to me a lot.