Wipeout Pulse Hints for PSP
This is in the manual but I have noticed on infrastructure, not many people do this.
Ok here go's
When you have gone over a ramp or jump press left, right, left or right, left, right on your directional pad.
If you have done this successfully, your ship will roll over and when you land you will be given a large speed boost (the equivalent to the ones you pick up on item pads)