I got a few calls about a small flashmob which took place in Amsterdam over the weekend. Then I did some research and found out there were several over the weekend, as part of a sort-of-silent campaign to promote Holland's tap water and raise awareness about the environmental impact of plastic water bottles. Scanning YouTube for some good flashmob footage, I found the best video and the largest group got together and boogied out in the center of Haarlem. I can't resist a well carried out and massive flashmob, and they did a great job, check it out: