25. Aykroyd created blobby green ghoul Slimer as an affectionate tribute to Belushi's Animal House character Bluto, who much like the late actor himself had a zest for food and mischief.
26. What left Venkman feeling so funky after being slimed was a "disgusting combination of corn syrup, starch, and some sort of an adhesive," Murray cracked on TODAY in 2014, "and a kind of a poison that's used on chinch bugs."
27. Reitman thought of Bond girl Grace Jones to play Gozer, but in the end they went with model Slavitz Jovan. Aside from her red eyes, she wouldn't have looked out of place at a downtown club in her skintight bodysuit (that she needed to be sewn into) and high-heeled boots.
Jovan couldn't see through her painted contact lenses, however, so it was "kind of a challenge" even to just stand in the right place, she told EW. "And then I'm kind of flying up in the air and then landing on a rock or something, so I was a little bit scared."
28. The 100-foot Stay Puft Marshmallow Man that stomps through the streets was dreamed up by Aykroyd and given form by his college roommate John Deveikis.
"I said, 'Give me a brand symbol that kind of looks like the Michelin Man and the Pillsbury Dough Boy—mix 'em,'" Aykroyd recalled. "He comes up with the sailor, which was brilliant." (Alas, they didn't have the effects capability to have him rise from the Hudson River, as the script called for, in the amount of time available.)
29. When crossing the streams works and the creature explodes, shaving cream rained down upon the city, drenching some more (Aykroyd) than others (Murray purposely wanted to have hardly any on him).
"I remember being on set the day when William Atherton got nailed with all marshmallow," Jason Reitman, who took the torch from his dad to direct 2021's Ghostbusters: Afterlife, told Empire. "They emptied a giant garbage bag filled with shaving cream. I kept this little white piece of foam, a piece of dead Marshmallow Man, for years after in my bedroom."
30. Now we'll tell you about the Twinkie.
After Ramis died in 2014, in honor of Egon's treatise on how much pyschokinetic energy was building up in the New York area, "there was like an altar of Twinkies and letters and pictures and flowers and candles at the Manhattan firehouse where they filmed the movie," his daughter Violet Stiel told EW. "It was really nice."
And much better than leaving spores, molds and fungus.