That’s about the damndest thing ever...scaring kids then extracting this stuff...bizarre.
In the movie, one creep hints “I’ve heard there’s only one way to make that stuff” or something like it. Fear/terror is used to make the body create adrenalin. Man this stuff is so sick I hope it’s just a sick story. Searching farther I see the director says he made it up as did Hunter Thompson. I suspect he didn’t because there is such an evil tone to the elites and I recall seeing pictures of a swanky “party” where the theme was cannibalism including humans lying on tables adorned as food. *shudder*