- Hugo! You don't mean that. You're joking. 
- Like hell I am.
5 seconds sound clip from the Dead of Night (1945) movie soundboard.
You can hear this line at 01:32:28.693 in the Blu-ray version of the movie.
Quote context
[...]
- What sort of dummy do you think I am?
- Yes, but that was in self-defence. He was trying to rob me.
- Poor Sylvester! Such a charming fellow. They tell me he's recovering, be out of hospital soon.
- Well, looks like I'll be needing a new partner.
- Hugo! You don't mean that. You're joking.
- What? You wouldn't run out on me now? I don't believe it. You wouldn't do that to me.
- Oh, wouldn't I? Wouldn't I? Wouldn't I?
- Can't stop me, Maxwell. You're finished. Finished.
[...]

 Dead of Night (1945)
 Dead of Night (1945)  Phantom of the Opera (1943)
 Phantom of the Opera (1943)  Scooby-Doo, Where Are You! (1969)
 Scooby-Doo, Where Are You! (1969)  Halloween III: Season of the Witch (1982)
 Halloween III: Season of the Witch (1982)  Knight Rider (1982)
 Knight Rider (1982)