What is the weirdest thing that you ever saw or heard?

I was just stacking away my crystal dishes when they rubbed against each other and the vibrating sound it made was like the sound you hear whales make. It sounded like a long painful whale cry. It was really loud and irritated my ears. Odder still was that it got louder as I tried to press them together to stop the vibration.

I never would’ve believed it, if I didn’t hear it for myself.
So it has me wondering what else out there is really odd.