An eight-year-old Tube superfan smashed the 'Metro Memory' game in under 90 minutes - naming nearly every single of the 581 stations.
Lewis Wing has been a passionate fan of the London Underground since he was a toddler.
He completed a mission to visit all of the stations on the network between the ages of three and six - because he loved it so much.
Two years on the schoolboy is still a fan.
So he took on the viral hit 'Metro Memory' game to see how he fared.
Incredibly, the Lewis listed 575 out of 581 stations in an hour and 22 minutes - only missing stops on the Overground.
He forgot Bush Hill Park, Silver Street, Rectory Road, Wood Street, Stamford Hill and Highams Park.
Lewis, from East London, said: "The challenge was mostly easy, I just did it line by line.
"I would have got everything but I don't know the Overground so well so those were the stops I missed.
"I started with the Bakerloo line but the quickest line I did was the DLR. I managed that in two minutes and 21 seconds.
"I had two one-minute breaks but that was it.
"If I did it again I know I'd get them all now!"
Mum Sheina Vasudevan, 48, said: "His dad and I took turns to be sure there was no cheating going on!"