Whatever this stuff is, it responds to human emotional states.
6 seconds sound clip from the Ghostbusters II movie soundboard.
You can hear this line at 00:39:54 in the Blu-ray version of the movie.
Quote context
[...]
- You have a weak electrochemical bond!
- I have seen some disgusting crud in my time, but you take the cake. You're a... You're just... Hey.
- This is what you do with your spare time?
- This is an incredible breakthrough. I mean, what a discovery. A psycho-reactive substance.
- Whatever this stuff is, it responds to human emotional states.
- You mean this stuff actually feeds on bad vibes.
- Like a cop in a doughnut factory.
- We've been running tests to see if we can get an equally strong positive reaction.
[...]