We have a brand new Improv Everywhere t-shirt for sale! the video above first, and then check out the behind-the-scenes photos and report The Mute Button. For latest mission of Improv Everywhere 23 actors and 2 dogs infiltrated a public space and went on "mute" at coordinated intervals. The mission took place near the northern entrance to Prospect Park in Park Slope, Brooklyn. The Mute Button was produced by Improv Everywhere as part of the Guggenheim Museum exhibition stillspotting nyc.