As a matter of fact our instincts fail us in most sports. Why, because fear and self preservation are much bigger motivators than logic and reason! You will always instinctively move away from danger, if your computer suddenly burst into flames would you stay right where you are or jump back away from it? Intuition also fails us in sports as we tend to use it instead of logic and reason. In other words what feels good often isn't correct and most people tend to learn by doing what feels good, they don't spend hours studying how to stay in balance and in control.
Moving your rear end way back on a descent feels good, you are moving away from danger! Skiers, snowboarders and mountain bikers instinctively do this yet it puts them in an out of balance, non-neutral (once shifted/leaned back we can only move or react in one direction, forward) out of control position. Despite all the logic that says we should be centered without practicing staying centered and neutral we will naturally creep back on descents.
Ever put your foot down in a corner?! Putting you foot down inside of you puts you off balance and makes you more likely to slide out yet we all do it. Even world champ Greg Minnaar does it occasionally, because it is instinctive, but Greg will be the first to say that putting your foot down is a bad idea!
If you are tired of letting your instincts put you in out of control and out of balance positions, looking only a few feet in front of you in technical sections (even though you know to look ahead) and want to start riding smoother, safer and faster invest in your skills and take a mountain bike camp from us that is guaranteed (or your money back) to greatly improve your riding.