This seems to be an interesting display of genius vs. common sense.
It helps to lean forward when you ride up a grade. Often times, your weight will be situated more toward the rear of the bike causing the front end to elevate when pressure is applied to the mechanism that causes the bicycle to propel forward. It's often referred to as a "wheelie".
Other interesting observation...if you are traveling in a forward direction and move the big cross bar with the rubber'y grips on it one way or the other...it helps to displace your weight to the side of the same direction as you move the cross bar.