[Jr. Mechanic]

For all the non believers, do this since you are right in front of a computer and these things should not be hard to find. Take a piece of paper, set it on the desk, then get a round pen or pencil that can roll, set it on the left side of the paper. Begin to pull the paper to your left slowly, then push the pencil any speed you want. That is the exact same principle as a real plane.