We must find him and destroy him before he can do this!
4 seconds sound clip from the Abbott & Costello Meet Frankenstein movie soundboard.
You can hear this line at 00:29:00 in the Blu-ray version of the movie.
Quote context
[...]
- There you are, so you thought I was imagining things, huh?
- Wait! Wait a minute. You're crazy, and so is this screwball!
- Look, bub, I have my own troubles.
- We must find him and destroy him before he can do this!
- I can't do that. Because then I'd have to tell them who I am and... why I know what I know.
- Soon... Soon the moon will rise.
- I've taken the room across the hall. Here's the key. Lock me in!
[...]