Madrid Metro

Video: How a child’s balloon cut off Madrid subway service for an hour

Metal surface touched overhead power cable at Sol station, triggering sparks

A child's balloon interrupts Madrid subway service.

A simple helium balloon interrupted Madrid’s subway service on Line 2 for an hour on Wednesday morning.

In security footage, the metallic-surfaced balloon – which Metro de Madrid authorities said was being carried by a child – is seen floating around Sol station, then getting stuck on the overhead power cable and touching the top of an incoming train.

More information

The combination created a “traction jump,” which has a similar effect to a fuse blowing. Sparks went off, burning the greased layer on the tracks and damaging cables.

As a result, service between Banco de España and Santo Domingo was suspended between 7.15am and 8.15am, during rush hour.

Metro authorities said that passengers inside Sol station were never in any danger.

You may also like

Most viewed in...

Top 50