That's from Avatar.
The Big Bang Theory Season 4, Episode 19
No, if I'm there alone people might think
I'm just a really short person from Avatar.
The Big Bang Theory Season 6, Episode 5
Why are they making
four more Avatar movies?
The Big Bang Theory Season 11, Episode 9
You saw E.T., Avatar, Jurassic World.
The military just shows up and takes over.
The Big Bang Theory Season 9, Episode 24
You even went as Avatar
for Halloween.
The Big Bang Theory Season 11, Episode 9