Villager houses generating over ponds

I found a house on top of a pond in Minecraft.

What I expected to happen was...:
It took me by surprise. I didn't expect to see anything unusual.

What actually happened was...:
I turned around, and there was the house, hovering over the water.

Steps to Reproduce:
1. Find a village. (/locate works best.)
2. Look for (a) house(s) floating over (a) pond(s).
3. If you don't find any, find another village or load up another world and find a village.