Oh, really? You don't... Oh. Terribly sorry.
6 seconds sound clip from the All Dogs Go to Heaven (1989) movie soundboard.
You can hear this line at 00:39:55.020 in the Blu-ray version of the movie.
Quote context
[...]
- Yoo-hoo! Reginald! Excuse me.
- Oh! Ha ha! Splendid! Hello, Stella! Jolly good day for a race, what?
- Oh, really? You don't... Oh. Terribly sorry.
- Ha ha ha ha! He did it! Whoo hoo hoo! He did it!
- Ha ha! No! Anne-Marie did. Ha ha ha!
- Happy birthday, Chawhee! Happy birthday! I knew you could do it! Happy birthday!
- Smiley, whaddya know, whaddya say? That's usin' your head. Ha ha, enjoy!
[...]