He always looks like that.
5 seconds sound clip from the Halloween (1978) movie soundboard.
You can hear this line at 00:33:54 in the Blu-ray version of the movie.
Quote context
[...]
- Sheriff? Pardon me, I'm, uh, Loomis. Dr. Sam Loomis.
- I'd like to have a word with you if I could.
- Maybe a few minutes. I gotta take care -It's important.
- I think he knew. I'm sure he could smell it.
- Did. See the look on his face?
- What are you gonna wear to the dance tomorrow night?
- I didn't know you thought about things like that, Laurie.
- You know, you could ask somebody.
- All you have to do is go up to somebody and say You wanna go to the dance?
- You could do that. I couldn't.
[...]