Perfect.
3 seconds sound clip from the Grease (1978) movie soundboard.
You can hear this line at 00:26:57 in the Blu-ray version of the movie.
Quote context
[...]
- No. I know what I'm doing. I'm gonna be a beautician, you know.
- What's the matter, you afraid?
- It's nice to know it's good for something.
- Perfect.
- I really don't think it's a good idea.
- Why don't we go into the bathroom.
- My mother will kill me if I get blood all over the carpet.
[...]