
I don't care if anybody gets it,
I'm going as the Doppler effect.
The Big Bang Theory Season 1, Episode 6

I'm the Doppler effect.
The Big Bang Theory Season 1, Episode 6

Sheldon is neither sound nor light,
but he's obviously the Doppler effect.
The Big Bang Theory Season 1, Episode 6

- Hey, what's Sheldon supposed to be?
- Oh, he's the Doppler effect.
The Big Bang Theory Season 1, Episode 6

Yes, well, I'm the Doppler effect.
The Big Bang Theory Season 1, Episode 6