I know them because if you're not perfect, never mind the yelling and the screaming and the firing...
6 seconds sound clip from the The Nutty Professor (1996) movie soundboard.
You can hear this line at 00:55:09 in the Blu-ray version of the movie.
Quote context
[...]
- You won't. I know you won't.
- Do you know how I know all these things?
- I'm going to strangle you and choke off your air supply until you pass away.
[...]