- Well, you know that mirror you gave me? You didn't get it at one of those joke shops, by any chance? 
- No, of course not. Why?
6 seconds sound clip from the Dead of Night (1945) movie soundboard.
You can hear this line at 00:34:43.551 in the Blu-ray version of the movie.
Quote context
[...]
- What shall we do tonight? Dress up, spend a lot of money?
- Why not?
- Should've worn our grass skirts.
- Well, we've danced enough anyway.
- Darling, is anything the matter?
- No. Why?
- I don't know. You seem to have been a bit broody all evening.
- A bit limp with the heat, I expect.
- Sure there's nothing the matter?
- That usually means there is something really. What is it?
- Well, you know that mirror you gave me? You didn't get it at one of those joke shops, by any chance?
- Well, it wasn't my room I was seeing, it was some other room.
- Darling!
- I told you it sounded silly.
- All done with mirrors, in fact.
- And of course, I had all the usual chaos getting ready for the wedding.
[...]

 Dead of Night (1945)
 Dead of Night (1945)  Phantom of the Opera (1943)
 Phantom of the Opera (1943)  Scooby-Doo, Where Are You! (1969)
 Scooby-Doo, Where Are You! (1969)  Halloween III: Season of the Witch (1982)
 Halloween III: Season of the Witch (1982)  Knight Rider (1982)
 Knight Rider (1982)