I'm not sure if it's air pressure or the way water works but somehow there's a tile that is completely being ignored by falling water. It's immediately going to the water to it's side. Then I thought holy ***** I can just build a tunnel back up and it'll have no choice to push upwards. I have now made an infinite loop of water being pushed upstream without a pump and then falling back down!!! Wow I was just listening to niel degrass tyson saying the universe is under no obligation to make sense