A funny sort of practical joke. It isn't funny.
2 seconds sound clip from the Dead of Night (1945) movie soundboard.
You can hear this line at 00:18:26.717 in the Blu-ray version of the movie.
Quote context
[...]
- How's that for evidence, Doctor?
- Naturally, you'll say it's a pure coincidence.
- Oh, you can't say that, Doctor.
- The odds are a million to one against.
- You seriously think we cooked the whole thing up between us?
- 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?
[...]