Commuters could have been forgiven for thinking they were still dreaming this morning.
As they passed through London Waterloo station on an early Monday morning, they came across a giant marshmallow man coming through the floor of the station.
People stopped to pose with the scary creature, otherwise known as the Stay Puft Marshmallow Man from the Ghostbusters franchise.
There was also slime dripping from the ceiling of the popular commuter station, and a Ghostbusters shop.
The station's latest additions were installed to advertise the latest Ghostbusters film.