There's a dark Friends theory that could change everything

There’s a new theory about our favourite sitcom, Friends, inspired by the cover of the boxset for season four.

Twitter user @thetedfox pointed out that, only Rachel’s eyes are open as the rest of the gang are seemingly snoozing with their eyes closed.

After request for theories, he's since been inundated with possible reasons why.

From the very believable...

To the less believable...

To the hilarious...

To the mindblowing:

Which a few people agree on:

Wow.

More: This is how much coffee the 'Friends' drank