A driver was spotted watching porn on the console screen of his car while stuck in a rush-hour traffic jam.
The driver was caught by dad-of-one Dan Kitchener, who was crawling behind the £75,000 Tesla S in 5mph traffic in Addington, south London, at around 8.15am last Wednesday.
A shocked Dan recounted the moment he saw the lewd clip on a screen through the car's back window.
Dan said: "It was slow-moving traffic. It was literally stopping and starting, a maximum of about 5mph in short bursts.
"It appeared at first that the Tesla driver was looking through a catalogue or similar.
"I briefly thought to myself: 'Well that's naughty while he's driving'.
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"As we moved along I could see him clicking on images and zooming in and did a double-take and realised he was zooming in on completely naked pictures of women.
"I was absolutely flabbergasted. It appeared to be some kind of website and he was just having a good scroll through. I couldn't believe it."
Dan joked: "I didn't mind being stuck in a bit of slow traffic for once. Sights were marvellous. Just when you thought you had seen it all."
Other drivers took the opportunity to poke fun at the Tesla driver.
Lee Oldham joked: "Oh no. He's got a crack in his screen."
Meg Sian added: "Keep both hands on the wheel," while Gary Webster said: "Autopilot in full use."
Simon Hill added: "Alway wondered why you need such a big screen."
Shaun Baker said: "Keep your eyes on the road at all times."