1.It's a balance between smooth air time and hard braking, but there are a few tricks to flying into the corners.
1. Sitting on top of the water break and looking over Jason Raines' shoulder, we can see there's a fairly sharp corner that follows. That—and the loose, rutted dirt with small rocks—makes it imperative that you don't hit the jump/water break with too much speed, yet you don't want to slow down too much and give someone the opportunity to pass.
2.2. Since the idea is to scrub some speed before you get to the jump—plus this one is a downhill at that—and accelerate off it, Raines throws his body farther back on the bike and maintains an overall level attitude. In addition, this lets him soak up a bit of the bike's upward trajectory, thus keeping the bike's flight as low as possible. Notice that he's also ready to hit the brakes and clutch the instant he touches down.
3.3. Faster and advanced riders may wish to kick the back of the bike out just a little (in the opposite direction of the upcoming corner) as it can help them set up for the turn.