That sounds faintly familiar.
2 seconds sound clip from the It's the Easter Beagle, Charlie Brown movie soundboard.
You can hear this line at 00:11:10.866 in the Blu-ray version of the movie.
Quote context
[...]
- Don't say I didn't warn you. The Easter Beagle does all that.
- Are you sure? Are you certain?
- And now that I got my shoes, I feel better about everything.
- Oh, good grief. He's crazy. There's no Easter Beagle!
- That sounds faintly familiar.
- I remember sitting out in a stupid pumpkin patch all night waiting for the Great Pumpkin to come.
- That was the worst night of my life.
- This is different. That was Halloween. This is Easter.
[...]