Brain Teaser SMS

A man is found hanging in an ice factory. There is no sign of violence and a pool of water is below him. there are no ladders or other climbing devices and the beam he is hanging from is 20″ off the ground.
How did the detective know it was suicide?

Answer: The man worked in an ice factory. He had stacked up the ice blocks so they were like stairs. The ice had melted leaving a pool of water.
Therefore it was suicide.