I give you...
The Human Trebuchet at Middlemoor Water Park

A water sports centre? With absolutely no experience of creating safe theme park rides? Building a wooden replica of a medieval weapon for use by the public? Yeah, that sounds safe.
For about £40 you could have the privilege of being launched 70ft into the air and land in a net the size of a tennis court. It was launched about 50 times a year. In November 2002, a Oxford student named Dino Yankof missed the net by inches and died. The catapult seems to have been quickly dismantled after that, and no mention of it is made by Middlemoor these days.
The warning signs were there, as a 44 year old woman broke her pelvis in 1999. That launch was actually filmed, as you can see at the end of this video of the trebuchet in action:
Talk about a disaster waiting to happen...
So what do we think of possibly the UK's greatest lost flat ride?