Nollie flips are probably my most solid flatground trick, and I can nollie over gaps, down stairs etc fine. I just can't put them together. I can't really do a nollie flip on anything but on flat, not even off a curb. I just don't get how to make the board carry on going forward and stay under my feet, the flick always makes it disappear behind me. Any advice? I'd love to be able to do it down something