This giant dunk tank was recently set up in the middle of Times Square in New York as part of the World Science Festival. Called Holoscenes, it's part of a free performance series designed to raise awareness about science and sustainability.
It was hard to tell if the people gathered around were just average tourists who found a neat thing to watch for free, or if they were actually here specifically for the performance. Whatever, they were riveted.
From 10 a.m. to 6 p.m. guests were invited to join in games, fitness and dance classes on the surface, which helped charge a battery. Afterward they were given a chance to charge their phones with the energy they had created.