The only way we'll ever isolate it is to catch someone at the instant of complete terror. Not before, not after.
8 seconds sound clip from the The Tingler (1959) movie soundboard.
You can hear this line at 00:19:29 in the Blu-ray version of the movie.
Quote context
[...]
- By the way, I think I've found a name for it. The Tingler. You like it?
- Why not? Since we don't know what it is yet, we can't give it a Latin name.
- Tingler. It must cover almost the entire backbone.
- David. You'll be too weak. From starvation.
- I know. I know. Don't keep David out too late because he has a hard day in the laboratory tomorrow.
[...]