I have this knife.
3 seconds sound clip from the The Texas Chain Saw Massacre movie soundboard.
You can hear this line at 00:12:58 in the Blu-ray version of the movie.
Quote context
[...]
- Hey, man, put that knife up.
- Oh! What are you doing to yourself?
- Oh, my God! Why are you doing that?
- I'm sure it is, man. Fold it up.
- Hey, you-you could take me to my house. I live right off this road.
- Well, I don't know, man. We're in pretty much of a hurry.
[...]