If you think it looks terrifying, it absolutely is. They also offer bungee jumping, which I'm definitely not a fan of. I feel like bungee jumping is the ultimate Teter Hang Up experience. Stretch out every one of those vertebrae, maybe add a few inches to your height. Although Gravity Canyon used to be super popular, it seems to have slowed to a halt because it's now showing closed - but it really was one of the fastest zip line in the world in it's hay day.