It was commissioned by British Airways for their new luxury lounges in Heathrow Airport in London, and was constructed by the Troika art and design studio. Cloud is 5 meters long and is covered with 4,638 of those little flip dot things that you still occasionally see in train station displays. The dots flip back and forth between black and reflective silver, creating both visual patterns and a nifty rainstick sound.

[youtube]http://www.youtube.com/watch?v=42hgPLL8IrA[/youtube]