Don't do that! Don't you know it's dangerous to disturb a sleepwalker?
4 seconds sound clip from The Honeymooners (1955) - The Sleepwalker sitcom.
You can hear this line at 00:01:52.931 in the Blu-ray version of the TV Series.
Quote context
[...]
- There, there he is. He's on the roof of McCloskey's building.
- You have to do something. If anything happened to Ed, you would hate yourself.
- Not for long. I have a very forgiving nature.
- Hey you, Norton! Get off that roof!
- Don't do that! Don't you know it's dangerous to disturb a sleepwalker?
- Ralph, Ralph, is he still there?
- Please, please go bring him back.
- Why does this always have to happen to me?
- Eight million people are in New York City, and I got to get mixed up with a human fly!
[...]