No Metro is a ghost train that you can hear, but you cannot see.

There are loudspeakers and hidden cameras located in the busiest metro station in the city.

Passengers are waiting for their train.

We set off our progressive sound programme that accurately reproduces the sound of the metro: the train approaching, the brakes, the doors opening, the doors closing, the train leaving the station.

Just like a ghost! Passengers could hear it but they couldn’t see it.

And at the peak moment of surprise and expectation, the legendary Ghostbusters sound track begins to play while the display panels in the station announce the remake of the film.

The video was shared across social networks, announcing the existence of paranormal phenomena in Madrid’s Metro.

It’s 10:30 am, at a Metro station. We placed loudspeakers and hidden cameras strategically all along the platform, and settled down to wait. When the passengers are on the platform the progressive sound programme system is activated. People start to hear the sound of a train approaching, but they can’t see anything. A wall of sound makes its entrance, blasting into the platform. It comes to a halt. Doors are heard opening and closing. The train sounds its whistle before leaving the station. And yet, they still see nothing. Then, when it seems that a ghost train has left the station, music starts to play – The Ghostbusters’ film soundtrack, revealing the true nature of the action and the arrival of a new film.

We shared the video of the action across SN. After a few days, it went from being a paranormal phenomenon to a viral.

In less than 3 days, with zero advertising investment, the paranormal phenomenon became a viral phenomenon.

- >100,000 shares.

- >5 million views (on Facebook).

- >300 media outlets reached all over the world.