Hats off to whoever told them the river runs in a circle. That's the kind of epic troll you usually see reserved for Facebook posts offering "helpful hints" that are actually sure-fire ways of ruining one's car or phone.

I'll bet someone's off their Christmas card list now.

I expect they'll empty it out with a hose and siphon.

Kind of reminds me of how I've seen people at conventions turn their hotel room bathtub into one enormous punchbowl with the aid of plastic sheeting and lots of juice and vodka.