I was sleeping on the living room couch in my one-floor house one night when my cat woke me up by jumping on my chest and batting me in the face, something that he never does normally. I also heard some sort of weird rushing noise that I couldn't make any sense of. I groggily got up and both stockinged feet went "sploosh" in the carpet, which I immediately knew was not a good thing at all.

Turns out my cat had been sleeping in the bathroom sink like he normally does, and he had somehow pushed the drain closed while also flipping up the faucet lever. This sink had no overflow drain so it quickly began pouring water all over the floor. By the time I got up, more than half the house's floors had been thoroughly soaked and a much larger amount of water had poured through the floor heating ducts and down into the basement.

I was impressed by my cat's intelligence at realizing something was seriously wrong and that the hooman needed to be woken up to deal with it. The moral of the story is where the fuck can you even buy a bathroom sink without an overflow drain? This one was on my cheap-ass landlord.