Bored by his usual morning commute, a train passenger came up with a novel way of spicing things up - racing London's Circle Line.
James Heptonstall dived off a Tube train at one station, sprinted 380 metres to the next station - and arrived in time to catch the same train.
He and his friend Noel Carroll took the Circle Line train to London's Mansion House station. At this point, 30-year-old Mr Heptonstall made a dash for it, sprinting off the train, up the steps, and along the roads to Cannon Street station.
As the train pulled into Cannon Street, Mr Heptonstall came down the stairs onto the platform and dashed into the same carriage he had left just seconds before.
Completing his challenge with just moments to spare, he crashed to the floor of the train, exhausted, as fellow passengers applauded.
The two stations were chosen because of the short distance between them and footage of the challenge, which included climbing 75 steps and going through two ticket barriers, was uploaded to YouTube by the pair last month.
Mr Heptonstall, an environmental consultant from Hampstead, told the Evening Standard: "We had seen some people had done endurance challenges on European transport networks and put them online but we had not seen anything done in London.
"I usually get the Northern Line to work in the morning - it's not an enjoyable experience so I sometimes run or cycle if I can."
The dash between stations took just 80 seconds for Mr Heptonstall, who plays touch rugby for England.
He said: "While I was running someone asked Noel what I was doing. They said they did not think I would make it.
"(The other passengers) were all waiting on tenterhooks. But then I dived into the Tube and they were applauding."