SPINtron was based on a NASA Multi-Axis trainer used by original Project Mercury astronauts. There was concern that the capsule could begin tumbling during reentry. Astronauts were strapped in the NASA version and had to carry out actions that simulated operation of the controls and switches necessary to stabilize the capsule.
Some interesting facts about SPINtron:
* Your stomach is centered in the axes of rotation to minimize movement. This means most people have no trouble.
* Because it moves in random directions your inner ear stays in balance so you don’t get dizzy.
* There are no motors. The only control is a single manual wheel. Your changing center of mass causes motion on the other axes.