This is one of those things that makes an ordinary trick shine. Everyone else's kickflips getting boring? See if you can pull off a nollie kickflip then. To be in the nollie position you are going to need to put your front foot right on the nose and your back foot in the middle, or on the back truck, basically the opposite to your normal stance. Now not only do you have to pop with the wrong foot, but you have to be ready for the board to move the other way to usual. This is pretty clever stuff if you can get it down right.