If it's higher, it'll most likely make your landing ROUGHER. You'll feel the shock more. Tires that are soft act as shock absorbers.
I mountain bike and just recently I went up to about 40 psi. (I ride hardtail). I could feel every single bump there was and before at about 30 psi, my tires smoothed it all out. Higher psi=more impact. However, the tires are more rigid and also offer less rolling resistance. So in turn, you get to go faster with less effort. Just like riding with a flat tire and a pumped tire. The pumped is easier to pedal with less traction.
By the way, the bmx forum's grammer and capitalization is nothing compared to the mountain biking forum. Heh!