There are a few hidden techniques that you can pull off for some bonus points, with the first being the "risky" maneuver. As the name suggests, this bonus is awarded to you when you barely graze past an obstacle. You do not have to be too close for this bonus to activate, so do not be TOO risky! Each risky maneuver is worth 50 points. The second hidden technique is the "slide" maneuver. If you slide from one end of the track all the way to other side in one smooth maneuver, you will earn the slide bonus which is also worth 50 points. You will probably first notice this bonus in the battle against The Howling Moons.