Well, then how do you know that somebody else was there?
4 seconds sound clip from the A Nightmare on Elm Street movie soundboard.
You can hear this line at 00:30:04 in the Blu-ray version of the movie.
Quote context
[...]
- How could somebody be under the covers with you guys without you knowing about it?
- I don't expect you to believe me anyway.
- What did he look like? Did you get a look at him?
- No.
- Well, then how do you know that somebody else was there?
- Because somebody cut her while I watched.
- And you didn't get a look at him?
- I couldn't even see the fucker.
- You could just see cuts happening all at once.
[...]