Tool has some fun with metal sheets.  I like these types of experimentation, hope the new album has fun tracks like this. Stuff like this makes them way ahead of the pack who tries to sound like them. Metal Sheets... takes me back to elementary school assembly in the mid-90s.
Once I was lying in bed playing my iPod on shuffle. I had almost fallen asleep when this song came on. Since I was only half-awake my thoughts had become pretty hazy so I thought it had suddenly turned incredibly windy outside. Then I was wondering what the hell that metal sheet sound was. I thought something was loose on the neighbour's roof.