You Don't See This Everyday

I was in the kitchen.
I heard a rush, actually, more like a gush of water coming from somewhere.
I panicked.

First I ran to the water heater. Nothing there.
Then the bathroom. Nothing there.
Then back to the kitchen. Again, nothing.

"Is the rain just really heavy, or something?" I thought.
So I peeked outside.



And this is what I saw: