How fast would the water have to be traveling for this to actually work? Pretty sure there was a waterslide built with a loop once and it infamously didn't work, but those work on gravity alone. With enough pressure it should be able to loop, right? Or would it just get wonky because it's a fluid? π€
I feel like this could be one of those things that works perfectly if you make a small model, but won't ever scale up due to reasons.