Aqualoop at Wet'n'Wild

The idea is you climb up to the top of the steps (which is a lot higher when you're up there) and step into a clear, upright tube. You cross your ankles, cross your arms over your chest and then... well then the floor disappears and you freefall with such velocity (up to 60km per hour) that it powers you around a loop and you get spat out the bottom. I wasn't planning on getting stuck but I came to an abrupt halt somewhere towards the end of the uphill section thanks to the pair of shorts I was wearing that were a bit too flappy I was told later. It took a second or two for me to realise what had just happened as most of my vital organs were still trying to catch up with the rest of me. Then the panic set in as I had visions of rescuers in cherry-pickers... or the next person down the tube flying feet-first into my head at full speed. I had to spend a minute or two hoisting myself uphill inside a smooth slippery tube which is hard, let me tell you. Eventually I regained momentum and plopped out the bottom where I was deafened with howls of laughter.

Again, again!