That'll hold 'em. Those things aren't that strong.
5 seconds sound clip from the Night of the Living Dead (1968) movie soundboard.
You can hear this line at 00:24:24 in the Blu-ray version of the movie.
Quote context
[...]
- We'll be all right here. We'll be all right here till someone comes to rescue us.
- We have to work together. You'll have to help me.
- Now, go in and get some wood so I can board the place up.
- Do you understand? Okay? Okay?
- That'll hold 'em. Those things aren't that strong.
- Here, I want you to pick out some nails. Pick out the biggest ones you can find.
- There. This room looks pretty secure.
- If we have to, we can run in here and board up the doors.
- Won't be long before those things'll be back, pounding their way in here. They're afraid now.
- They're afraid of fire. I found that out.
[...]