Very clever of us, I must say. I wonder if we have any more surprises up our sleeves?

5 seconds sound clip from the Dead of Night (1945) movie soundboard.

You can hear this line at 00:18:38.020 in the Blu-ray version of the movie.

Quote context

[...]

- Well, as an explanation, it's not any more far-fetched than Mr. Craig's.

- And the jokes on me, too, for I didn't know anything about it.

- A funny sort of practical joke. It isn't funny.

- What conceivable motive do you think we possibly could've had?

- No doubt you thought it would be very amusing to watch my cherished disbeliefs being shattered.

- Very clever of us, I must say. I wonder if we have any more surprises up our sleeves?

- That's it! Your glasses.

- What about my glasses?

- It's later on, we're having drinks, you break those glasses of yours, and then, quite suddenly, the room goes dark.

- Then, Foley, you say something, something about the death of a man I've never heard of.

- And that's where my dream becomes a nightmare, a nightmare of horror.

- Horror? What sort of horror?

[...]