I shall announce this evening that the whole thing is a hoax, and you'll be the laughingstock of the entire country.
7 seconds sound clip from the The Invisible Man (1933) movie soundboard.
You can hear this line at 00:35:41.982 in the Blu-ray version of the movie.
Quote context
[...]
- Griffin? Griffin? Are you there?
- Who's that, opened that door?
- Here, you leave this door alone. It's private, see?
- Yes, you did. Go on! Go on! Off you go!
- Lies from beginning to end! I have a good mind to prosecute the whole lot of you for conspiracy.
- He's here! The Invisible Man!
- Don't leave me! Wait for me! Don't leave me! Wait for me!
- A hoax, is it? All a hoax? All a hoax? There.
[...]