It's probably just some animal.
4 seconds sound clip from the The Evil Dead (1981) movie soundboard.
You can hear this line at 00:10:48 in the Blu-ray version of the movie.
Quote context
[...]
- Nis nis... Tu Tu Tu... Tu-tar-im.
- Whatever it is, it's still down there.
- I don't like cellars. Let's just close it up.
- It's probably just some animal.
- That is the stupidest thing I ever heard of. Jesus Christ.
- Well, there's something down there.
- Well, maybe it is just some animal.
- Yeah, you're probably right. It's probably just some animal.
[...]