Well, it was an expression of complete horror. Fright. Almost insane, I guess.
8 seconds sound clip from the Fiend Without a Face (1958) movie soundboard.
You can hear this line at 00:33:53.932 in the Blu-ray version of the movie.
Quote context
[...]
- My mind is really buzzing with these strange words.
- Just a few elementary ideas on the subject, Major. Not so advanced as present-day developments.
- I'll transcribe these while you talk. Excuse me.
- That business with her brother... She was devoted to him.
- I don't want to seem morbid, but did you see his face after he died?
- Yes.
- What was it like? I have a reason for asking.
- Well, it was an expression of complete horror. Fright. Almost insane, I guess.
- No, just a false alarm. That's all.
- Mmm, about the supernatural. Something unreal, something never seen by anyone before.
- I can't accept that. I've always disproved such theories.
[...]