What Is The Derpiest Thing Your Cat Has Ever Done?

At a previous house we moved to, we brought three cats with us. In the first month, all three cats jumped down in the space behind the washer and dryer and got themselves stuck. Each at a different time. All three times, I had to kneel on top the washer, lean my upper body behind the the machine, and reach to pull the cat out. Thankfully, despite my average height, I have long arms.
They never did that again!