I often feel it myself.

4 seconds sound clip from the Forbidden Planet (1956) movie soundboard.

You can hear this line at 00:26:23 in the Blu-ray version of the movie.

Quote context

[...]

- Uh, yes. Perhaps you better call them, my dear.

- All right.

- Come, gentlemen.

- Felt something go right through my head.

- Uh, Alta's whistle is above the pitch of human hearing.

- I often feel it myself.

- What's up?

- Look.

(TIGER GROWLING)

- No, no. No, no, watch.

[...]