Ha-ha. We fooled him. Ha-ha-ha-ha...
4 seconds sound clip from the Mickey Mouse movie soundboard.
You can hear this line at 00:37:35 in the DVD version of the movie.
Quote context
[...]
- All alone, without your dog.
- You know, I used to have a little cat once. And when it was left all alone, it'd cry, 'meow!'
- Help! How dare you! You masher! Striking a poor, defenseless woman. Take that, you fiend! You...
- Oh, excuse me. I'm sorry. You won't be disturbed again.
- Ha-ha. We fooled him. Ha-ha-ha-ha...
- Hey-hey-hey, you! Did you see a mutt and a little runt around here?
- Yeah, it went... Ahem. They went that way.
[...]

 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)