Did you ever think you were seeing double when watching the pilot episode of Friends? And we're not talking about Phoebe's 'twin sister' Ursula.

Back in the opening episode of the hit nineties sitcom, fans might have noticed that in one scene, there was just no escaping Phoebe Buffay.

It sees Phoebe telling Rachel that she just pulled out four eyelashes, and then the camera goes to Paul the Wine Guy to get his reaction, and you can see Phoebe in the background listening to her own conversation.

Weird...

Take a look below:

If you want to see the episode in full, you can just head to Netflix, where after much demand, all ten seasons of Friends have now been added.