Photo 54 of 354
This nice graphic (thanks, Wikipedia Commons) illustrates the way that at all launch angles less than 45 degrees, a lower trajectory results in a shorter flight. That means that at any given speed, a lower trajectory allows a rider to land and get on the power sooner. It’s equally true that a lower trajectory allows a rider to hit jumps faster without overjumping his landing. The much crappier drawing below is my own illustration of the way a scrub lowers the trajectory vis-a-vis the launch ramp.