That's a bunch of bullshit.
5 seconds sound clip from the Escape from New York movie soundboard.
You can hear this line at 01:14:52 in the Blu-ray version of the movie.
Quote context
[...]
- The Duke don't want a dead president.
- Cyanide?
- Yeah. He might try to take it tomorrow.
- You're not supposed to be in here, Brain.
[...]