Why not?
3 seconds sound clip from the Hellraiser (1987) movie soundboard.
You can hear this line at 00:11:01 in the Blu-ray version of the movie.
Quote context
[...]
- Dad, this isn't a gesture. This is something I need to do.
- Come on and trust me a little, okay?
- Call me tomorrow. I will. I'll see you.
- So?
- Why not?
- Great.
- Listen, look out for the molding on the way through here. All right. All right.
- Are you all right back there?
- Okay. Now just take it straight up the stairs.
[...]