But for some strange reason they left!
5 seconds sound clip from the 101 Dalmatians (1961) movie soundboard.
You can hear this line at 00:09:07 in the Blu-ray version of the movie.
Quote context
[...]
- PONGO, you silly old thing! Come on. Come on, let's have it, boy. PONGO! PONGO!
- For a while, it seemed to work. At least they had seen one another.
- Things were going along first-rate.
- But for some strange reason they left!
- Come on, you old renegade. We're going home.
- But I wasn't giving up. I was determined that, somehow, they just had to meet.
- Oh! I beg your pardon. I'm so sorry. Please excuse me.
[...]