
Not a lot. That we always have the
option of going BACK to being friends.
The Big Bang Theory Season 3, Episode 2

You don't have the stomach
for it, scurry BACK into hiding.
Game of Thrones Season 7, Episode 2

No, no. You've always wanted to send your
food BACK in a restaurant. Here's your chance.
The Big Bang Theory Season 6, Episode 23

You know, if that study's real, Leonard
might come BACK smarter than you.
The Big Bang Theory Season 9, Episode 20

I'm BACK.
The Big Bang Theory Season 2, Episode 1