Rotor
It owes its presence at the Oktoberfest due to the Pluschies family. It demonstrates how a centrifugal force can overcome the force of gravity.
In fact, in the Rotor, passengers enter via an open cylinder on the ceiling, and lean against the wall that starts to rotate faster and faster; at this point the floor inside the cylinder disappears, but because of the effects of the centrifugal force, you cannot fall in a vacuum, but instead remain attached to the wall.
The effect will astound you, and will amaze your children if you are with the family.