El Diablo Robotico said:
So, the psychic/medium power called Ectoplasmic Secretions is an interesting and bizarre power. I'm wondering what the inspiration for that came about? Any literary sources? Movies? What? Where'd that idea come from? Ghostbusters? It's a weird one.
No, 19th century spiritualism. (Which is where Ghostbusters stole it.) Take a look around at the subject, Google Spiritualism, Ectoplasm, Theosophy, Madame Blavatsky, and Astral projection. Be warned - you will be buried beneath a ton of results.
The Auld Grump, the truth is out there - the lies are all inside.
*EDIT* One of the more amusing (at least to my skeptical soul) reponses is here: http://www.takeourword.com/TOW139/page2.html
Note the easily visible stick holding up the 'ectoplasmic' head... Frauds have gotten better since then. (If you look at the original 'faerie pictures' that fooled Arthur Conan Doyle you can see the hat pins that are holding a few of them up too...)