A man is convinced he has found his doppelgänger after randomly swimming past his look-a-like while on holiday.
American Sean Douglas McArdle caused a splash when he got into the pool in Las Vegas, US.
Drifting past the stranger, he thought nothing of it until his pals and other swimmers starting laughing at him.
He did a double take when he saw the man, who was also wearing a white cap and similar glasses - and the resemblance is uncanny.
The pair posed for a snap together and it was shared to Reddit, where it racked up nearly 100,000 likes and plenty of funny comments.
Sean joked that he wasn't "convinced until now we are in a simulation" after meeting his "twin" while on their break.
He wrote: "I wasn't convinced until now… we are definitely in a simulation.
"Today I randomly swam past my doppelgänger at the Flamingo pool in Vegas."
Readers had many questions, and he went on: "I was just swimming by in the pool and a big group of strangers were pointing at me and laughing.
"I got really self conscious, looked back at my friends and they were all pointing and laughing at him. Thats when I saw him.
"I immediately thought: "holy s*** that guy looks like the dude I see in the mirror", and my second thought was: "He looks cooler than me".
"Probably has real Club Master Ray Bans unlike my Zenni knock-offs."
The jokes were flying on the popular website. One told him: "Maybe the player is using console commands to take control of you and steal your valuable items, or make you do embarrassing stuff.
"Have you ever done something that you felt you had no control over? That's the player."
Another said: "There are three of you guys at every brewery."
Someone else responded: "They exist simultaneously within easy reach of every craft beer. I don't get the science behind it, but it's an interesting phenomenon nonetheless."
