I've placed a charge 12 feet along the tunnel. It'll bring the roof down.
3 seconds sound clip from the The Mummy (1959) movie soundboard.
You can hear this line at 00:12:56.880 in the Blu-ray version of the movie.
Quote context
[...]
- You want to see the inside of the tomb for the last time?
- The sooner you seal it up again, the happier I shall be.
- There's something evil in there, Uncle Joe. I felt it.
- Oh, well, let's get it over.
- I've placed a charge 12 feet along the tunnel. It'll bring the roof down.
- For this desecration, you will be avenged.
[...]