Over 2,000 people walked "invisible dogs" down the streets of Brooklyn on a Sunday afternoon. The leashes were on loan from the current owner of 51 Bergen Street, the factory space where the invisible dog toy was invented in the 1970s. Participants of all ages spread out from Red Hook to Brooklyn Heights, very seriously walking their very silly dogs.

This is one of nearly 100 different missions (funny pranks) Improv Everywhere has executed over the past eight years in New York City. Others include the Best Game Ever, the Food Court Musical, and the famous No Pants Subway Ride, to name a few.