zero center of gravity device

Factual Questions
1

While thinking about my screen name, I realised that I don’t know the name of the device that you see at fairs where the rider is attached at his center of gravity into a universal joint and hosed down to make him spin and flip (“gyre & gimbel”).

I Googled. I failed.

2

I’ve seen one called a Gyro-gym. Try that.hyphenations.

3

Thanks Padeye. I’ll have to get one for my dream house - it’ll go right between the giant lava lamp sensory deprivation chamber and the hypnotarium.