#BBCtrending: How 'Race the Tube' went global
The craze for racing trains and uploading the results on YouTube - kickstarted in London a couple of months ago - has gone global.
The practice has become known as #racethetube after a video, external made in London was watched more than 5 million times on YouTube. It involves getting off a train and running to the next stop to catch the same train.
Recently the trend went global, but there are earlier examples. In 2005, a student in Scotland tried to beat the train in Glasgow, external. And a similar video filmed on the metro in Paris, external trended in 2012.
Anne-Marie Tomchak, external reports
Video journalist: Neil Meads
Want more? You can watch the full interview with the man behind Race The Tube on BBC Trending's YouTube channel, external.
You can follow BBC Trending on Twitter @BBCtrending, external. All our stories are at bbc.com/trending