He seems to know you're out here. It sets him off.
3 seconds sound clip from the Isle of the Dead (1945) movie soundboard.
You can hear this line at 01:01:04.861 in the Blu-ray version of the movie.
Quote context
[...]
- Shut me in. In the dark. Shut me in again. Closed in. Shut in.
- It doesn't look much like the fish spears I knew back at Marblehead.
- They still use spears like that in Corinth.
- Vorvolaka, I hear her. I hear her.
- He seems to know you're out here. It sets him off.
- Why don't you get to bed? You need some sleep.
- A little frightening up there? Well, I can't blame you.
[...]