This piece first reminded me of The Real Ghostbusters episode Flip Side. As I’ve seen the episode recently. If you don’t know what I’m referring to, its when Peter, Ray, and Egon were in Boo York and “fired” their nutrona wands for the first time at The Peoplebusters. Instead of the positive confinement streams, “the polarity was ‘unnaturally’ reversed” causing the Proton Packs to emit low class ghosts!
I don’t know if Dan subconsciously thought of this. Of course based on Ghostbusters and the 30th Anniversary story, it could be from ghosts somehow escaping The Containment Unit.