On a recent trip to Disney World, I spent some time at Pleasure Island (the night spot), and perused the many clubs, restaurants, exhibits, etc. Besides the velcro wall and the ring toss, they also had a few of those triple-ring gravity rides. You strap yourself into the center of it, and since you're now riding on three rings pinned at their edge, you can move in all three degrees. Some people got up quite a good deal of speed on them. While watching, I noticed the sign. EXPERIENCE WEIGHTLESSNESS With up to 2 G's of force on your body
(From the "Rest" of RHF)