Who You Gonna Call?

Improv Everywhere causes scenes of chaos and joy in public places. Created in August of 2001 by Charlie Todd, Improv Everywhere has executed over 100 missions involving tens of thousands of undercover agents. The group is based in New York City.
For one of their latest missions, they brought the movie Ghostbusters to life in the reading room of The New York Public Library at 42 Street. The 1984 movie begins with a scene in the very same room, so they figured it was time for the Ghostbusters to make an encore appearance.