Puddle of Water

A man is found in a room without any windows, with just one door which is locked from inside. The man is hanging from a ceiling fan, dead, 4 feet above the floor. The room is completely empty, except for the man, the fan, and a puddle of water on the floor. How did the man die?

The man used a block of ice so that he could hang himself, and then the ice melted into the puddle of water.