Well, you're liable to get nervous, Ralph, and forget what you do know. Any person could do that.
5 seconds sound clip from The Honeymooners (1955) - The $99000 Answer sitcom.
You can hear this line at 00:11:19.640 in the Blu-ray version of the TV Series.
Quote context
[...]
- Ho, ho, ho, ho, ho! Ho, ho, ho, ho. Bang! Zoom!
- Now, look, Ralph. I don't doubt that you know a lot about popular songs.
- Let's say you know all there is to know about popular songs.
- There is just one thing that you're overlooking, Ralph.
- Well, you're liable to get nervous, Ralph, and forget what you do know. Any person could do that.
- Are you kidding? Ha. I'm at my best when I'm under pressure. I never get nervous.
- And I'm not leaving one stone unturned. There'll be no chances for mistakes.
[...]