Ha-ha! Fooled ya. Rubber.
7 seconds sound clip from the Happy Go Nutty (1944) movie soundboard.
You can hear this line at 00:05:57 in the Blu-ray version of the movie.
Quote context
[...]
- Duh. This picture is screwy enough without two of you.
- Ha-ha! Ha-ha! Sure was a funny gag. Too bad you couldn't see it.
- Hey! that was the end of the picture.
- Hey, uh... Before you leave... Uh, just what was the idea of chasing me all through the picture?
- Uh, because you're crazy. You think you're Napoleon, but you ain't. I am!
- You know, I like this ending. It's silly.
[...]