He's mad, a raving lunatic! He's killed a man tonight.
4 seconds sound clip from the The Invisible Man (1933) movie soundboard.
You can hear this line at 00:43:14.100 in the Blu-ray version of the movie.
Quote context
[...]
- I've got the doors padlocked. I'll keep him out.
- Hello? Hello. Get me eashire, 1021.
- Hello?
- Doctor, listen. There's something ghastly. It's Griffin. He's come back.
- He's the Invisible Man. He's asleep in my room.
- He's mad, a raving lunatic! He's killed a man tonight.
- Listen to me. No one but you and I know that it's Griffin.
- I shall come in the morning.
- You must come now! I can't bear it!
- If I come now, he'll be suspicious and escape.
- You must keep him calm and quiet for tonight.
[...]