If you leave coffee on your car and it freezes, it might become frozen coffee.

If it gets warm enough to melt again, it's just coffee again.<br><br>If you leave a puddle of water out on a cold day, it becomes a puddle of ice but when it gets warmer it's just a puddle of water again. Why isn't the ice just... Ice?<br><br>Edit: thanks for the awards, I guess this one resonated with a lot of people.