Fans of Friends are notoriously obsessive when it comes to their favourite sitcom. They love nothing more than spotting jokes and messages hidden by the producers in the background of scenes.
There are dozens of Easter eggs: Ross misspelt Rachel's surname on an envelope addressed to her, for example, and Gunther, the manager of Central Perk, once displayed a raw potato on his counter. The list goes on but any true Friends lover will be aware of these quirks.
Now, though, something else has been spotted, which no-one seems to have noticed before. In season eight, during the episode The One with the Tea Leaves, Ross is seen wearing a T-shirt with two interlocking hands on the front. So far, so forgettable. But it now transpires that this symbol means "friends" in sign language.
This information was flagged up on Reddit this week, surprising everyone. “This is actually a new thing I’ve not heard before,” wrote one user. “That’s pretty cool,” added another. Hard to disagree.