- It's good. It's a good, aggressive behavior.
- Better than my act?

5 seconds sound clip from the An American Werewolf in London movie soundboard.

You can hear this line at 00:31:37 in the Blu-ray version of the movie.

Quote context

[...]

- It was in Warwick Castle that I came across the curious stranger who I'm going to talk about.

- He attracted me by three things: his candid simplicity, his marvelous familiarity with ancient armor, and the restfulness of his company, for he did all the talking.

- We fell together, as modest people will, in the tail of the herd that was being shown through, and he at once began to say things which interested me.

- Puppetry is an art form, Piggy.

- You call that violence art?

- Well, violence belongs with puppetry.

- He is hitting her.

- That's Punch and Judy. They've always been violent.

- It's good. It's a good, aggressive behavior.

- Better than my act?

- I'm just watching a puppet show right now.

- I was going to bite you very badly.

- Get the door!

(KNOCKING ON DOOR) I'll get it.

[...]