Don't talk like that. The Great Pumpkin knows which kids have been good, and which kids have been bad. You'll be sorry.
8 seconds sound clip from the It's the Great Pumpkin, Charlie Brown (1966) movie soundboard.
You can hear this line at 00:10:23.870 in the Blu-ray version of the movie.
Quote context
[...]
(Military marching drum cadence)
- Hey, have you come to sing pumpkin carols?
- You blockhead! You're gonna miss all the fun, just like last year.
- He'll come here because I have the most sincere pumpkin patch, and he respects sincerity.
- Do you really think he'll come?
[...]