Oh, he scraped his fingernails along things.
5 seconds sound clip from the A Nightmare on Elm Street movie soundboard.
You can hear this line at 00:07:42 in the Blu-ray version of the movie.
Quote context
[...]
- All day long, I've been seeing that guy's weird face and hearing those fingernails.
- Fingernails? That's amazing, you saying that. That made me remember the dream I had last night.
- I dreamed about a guy in a dirty red and green sweater.
- Well, what about the fingernails?
- Oh, he scraped his fingernails along things.
- Actually, they were more like finger-knives or something. Something he made himself...
- But they made a horrible sound.
- It was like: (IMITATES SCRAPING)
- Nancy, you dreamed about the same creep I did.
[...]