You go out of the station, and go downhill for quite some time before you reach the "first hill", which really isn't much of a hill. Just to look at the physics, if you go down, you have to come back up. Its just backwards from what most are used to. For example on Vortex you go out the station and go up. On AE, you go out the station, and go down. So at some point you have to come up.