Rattle, rattle, rattle

Except it's very fast and consistant. What am I talking about? The air conditioner that is no longer outside but above my head is making anthing not screwed down tightly rattle.
That's right, for the next few months while we are remodeling we have the air conditioner in the room that is missing a wall. So we can continue to have a cool summer my room is going to hum and rattle.

My joy knoweth no bounds.