I was driving back from work just now, at about 2:30am. I saw this amazing sight on the road. There were 4 people riding bicycles in a rectangular formation in the middle of the road. Across their heads was draped a huge something made of plywood. I couldn't get close enough to see, but it might have been a billboard. I'm guessing the distance between the front and rear cyclists was about 12-15 feet, and the distance between two adjacent cyclists was about 8-10 feet.
Only in India. I wish I'd had a camera with me!