Here's a crazy little video.
A supermarket in China has installed tracks on all five of its floors. Shoppers sit along for the ride and can grab the items they want along the way. According to the video, the developers are hoping the idea catches on elsewhere.
The major drawback, however, is that if you miss something along the way, you have to go back and do the whole thing again from the beginning.
(Via Boing Boing)