Knock yourself out.
Breaking Bad Season 3, Episode 10
-(KNOCK ON DOOR)
- Hey.
The Big Bang Theory Season 10, Episode 7
[KNOCK ON DOOR]
The Big Bang Theory Season 8, Episode 6
That's not the secret KNOCK.
The Big Bang Theory Season 1, Episode 16
[KNOCK on door]
The Big Bang Theory Season 12, Episode 19