Boil one cup of water. Go outside and toss the water up into the air away from your body.
If the temperature is cold enough (minus 20 in this case), this is what happens.
As the boiling water meets the cold air, it instantly vaporizes. Most of it is turned into a cloud of steam that drifts gently away and some of the droplets that stay together are instantly turned into small pieces of ice that can be seen streaking down towards the bottom left in this photograph.
And all you’re left with is a cloud of water vapor.
Pretty cool, huh?