If I believe that, I'd knock you lopsided. What you're talking about?
6 seconds sound clip from the Palooka (1934) movie soundboard.
You can hear this line at 01:03:55 in the Blu-ray version of the movie.
Quote context
[...]
- Ah, you're crazy. I knocked him out once, didn't I?
- You think you knocked him out. What really happened, he came into that ring stewed to the gills.
- You didn't knock him out. He fell down, and he couldn't get up.
- What about those other fights?
- They were all set ups. Hand picked. I personally paid every one of them to lay down.
- If I believe that, I'd knock you lopsided. What you're talking about?
- Joe, listen to me. Would I lie to you?
- You're just wasting your time. I'm going to fight McSwatt, and that's that.
- You're going to fight McSwatt?
- And my goal mine turns to what? Dust and ashes.
[...]