Butane floats on water because it's a lighter fluid.

@catsalad

Well, actually...

[ooh, I get to be 𝙩𝙝𝙖𝙩 guy...]

Butane boils at -0.8°C so it wouldn't be on the water for very long.

I'll get my hat and coat...

@Walrus @catsalad

What if the water were frozen?

@pete @catsalad

Then it's not water...

@Walrus @catsalad

What is frozen water if not water?