Do you enjoy amusement rides? What about bemusement rides?
Part of what makes this so effective is the authentic nature of the background sound mix for the fairground shots.
The script is also very clever, by the end you almost agree with the professor's thoughts. The actual website for the Institute for Centrifugal Research is where it's all explained. Do also click on the 'FrameBox' tab while you're there for further illumination.