Looks so fun! This happened at a Russian firefighting station. I guess they were just trying to find some entertainment between calls. You've gotta give it to them though... that is a pretty sweet magic carpet trick!! You can probably figure it out just by looking but I'll explain anyways: they're using the mini trampoline/catcher and several fire hoses.
The water pressure is completely even between the hoses, so the person riding it just needs to balance in order for it to work! How neat is that?