Make any special grind that you want. I chose to do mine with Muska 5-0 Flames special grind. Now pick that grind and make the buttons for it up down or down up. Now get your special up and do a 50-50 grind. While doing the 50-50 hold down and press R2. If done right you will see a glimpse of the special grind or a part of the animation of the special grind you chose.