Gravitron

The Gravitron first appeared at Morey's Piers in 1983 and quickly became a fixture at amusement parks in many countries. The ride is completely enclosed, with 48 padded panels lining the inside wall. Riders lean against these panels, which are angled back. As the ride rotates, centrifugal force is exerted against the pads by the rider, removing the rider from the floor, due to the slant. The ride can reach a maximum speed of 24 rpm in less than 20 seconds. At this speed, the riders are experiencing centrifugal force equivalent to three times the force of gravity.

And always a personal favorite of mine at the Baradine Show.