The ghosts arrive first, and they're barely in their seats when the Ghostbusters show up to chase them out of the reading room at the New York Public Library. Both the Ghostbusters and their prey spread laughter throughout the Fifth Avenue landmark before receiving a round of applause as they leave. It gets better: The library was in on the stunt, by the performance-art troupe Improv Everywhere.
"The library is facing serious budget cuts, and they thought having us do something awesome there might serve to remind people of how great the NYPL is," according to the Improv Everywhere blog, which features hilarious behind-the-scenes photos and details. After the performance, the New York Times speculates, "presumably, they all head over to Central Park West and smear themselves with marshmallows."
(Read more Ghostbusters stories.)