The wonderful Improv Everywhere's latest prank involved a bunch of identical twins riding the same subway in New York City. Human Mirror (Laughing Squid), Human Mirror project page (Improv Everywhere)
Previously on BB:
• Food Court Musical by Improv Everywhere
• 207 pranksters stand still for 5 mins in Grand Central Staition
David Pescovitz is Boing Boing's co-editor/managing partner. He's also a research director at Institute for the Future. On Instagram, he's @pesco.