We mustn't underestimate American blundering. I was with them when they blundered into Berlin in 1918.
— (Claude Rains)
7 seconds sound clip from the Casablanca (1942) movie soundboard.
You can hear this line at 00:51:17 in the Blu-ray version of the movie.
Quote context
[...]
- Was it Laszlo, or were there others in between or aren't you the kind that tells?
- I strongly suspect that Ugarte left the letters of transit with Mr. Blaine.
- I would suggest you search the café immediately and thoroughly.
- If Rick has the letters, he's too smart to let you find them there.
- As to Laszlo, we want him watched 24 hours a day.
- It may interest you to know that at this very moment he's on his way here.
- I'm delighted to see you. Did you have a good night's rest?
[...]