I’m not sure ‘hoax’ is the word you want to use. I assume you’re referring to the Manchester Pusher?

The bodies are real, but it sounds like (after a quick search) the authorities blame accidents and such like.

keep in mind, if you’re falling into 3 feet of water, you’re more likely to be injured from hitting the bottom rather than jumping into deep water, and if you’re drunk or something, even if you’re not injured from the fall, you’re still likely to drown. you can drown in a puddle if you pass out with your face down in it.