You've done it, you stupid old man. Now you got to undo it.
7 seconds sound clip from the Pet Sematary (1989) movie soundboard.
You can hear this line at 01:08:05 in the Blu-ray version of the movie.
Quote context
[...]
- Don't bother, Jud. I'm coming home.
- Rachel, no. You don't want to do that.
- I have to do it, Jud. Goodbye.
- You've done it, you stupid old man. Now you got to undo it.
- It's going to be all right. I swear it's going to be all right.
- I'm coming for you, Rachel. And this time, I'll get you.
[...]