A carefree commuter was snapped doing an entire yoga sequence for 20 minutes in the middle of a busy train from London Euston.
The train had only been two minutes into its journey to Hemel Hempsted when the 'exhibitionist', dressed in a grey collared shirt, rolled up his sleeves, quietly laid down his rucksack and began subtle neck stretches.
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Fellow passenger Jamie Dawson claims other commuters were sniggering and peering over their newspapers as they watched the yogi's brave routine last Wednesday.
The man, believed to be in his 40s, began with a backward-bending camel pose before flowing into full splits, a warrior position - but stopped short of a headstand.
Drinks company owner Jamie said: "It was really amusing at the time. Everyone was looking each other over their newspapers and sniggering to themselves.
"The guy was completely oblivious. He had his earphones in and was totally in the yoga zone.
"I'm guessing he must do this quite a lot because he was definitely a regular yogi.
"The journey lasted about 20 minutes before he got off at Watford Junction and he did the whole sequence on that train. Maybe he'd slipped yoga class or something.
"This obviously isn't a normal thing for you to see on the train. It was quite a surprise after a long day at work.
"He was clearly quite the exhibitionist.
"I thought it would only last five minutes but he just kept moving on the different poses.
"He had his rucksack just placed by the doors to the side and he was literally bent over backwards.
"The carriage was only around half full but he was still blocking the doors for people to get past.
"He literally had no idea and people were stepping over him to get past as he switched positions around them.
"It was just hilarious. It really made people laugh.
"I think at the moment especially, people are a bit on edge when on the trains, but this guy was just doing his thing and keeping people quietly entertained in the meantime."
Amused social media users commented on the picture when it was posted on Facebook.
Edward Burkin said: "That's not what they meant by a flexible ticket."
A spokesperson from London Midlands, the train operator that runs this service, said: "This just goes to show how much more you can do travelling by train. You couldn't do this driving down the M6."
The spokesperson also said as long as passengers are not interfering with the ability of other customers to enjoy their journeys they welcome people pursuing their hobbies while travelling.