This is pretty cool. A group of performance artists in Berlin have used a Mac Mini to create some really unique public art. They put the small computer, along with a projector and a large battery supply into a suitcase and suction-cupped it to the side of a subway car. Once in motion, the Mac begins to project images along the subway wall. In this day and age, I think I would be a little nervous watching someone attach a suitcase to the outside of a subway car. Nevertheless, this is fun.
Check out the video clip here.