This short clip was the inspiration for an office chair I made. During their training, student pilots are spun round in a 'Bárány chair', named for the Hungarian physiologist Bárány Róbert. When blindfolded, you no longer feel the rotation after several minutes, but instead think that you are moving forward. If you place your head on the rail and the chair is stopped abruptly, your body will uncontrollably move backwards with a jolt, and your arms will dart out into space. I think it's really interesting that an object like this chair can cause such a movement.