Corrected entry: In the sequence where the ghosts go berserk in New York, one ghost shoots itself into a taxi cab through the muffler. Right after that a man goes into the taxi, and we see the ghost at the wheel, in the form of a live corpse. The taxi then proceeds to drive off. However, it is now being driven by a regular guy, easily visible in the shot for a second or two.
Corrected entry: Scene where Venkman gives Egon the candy bar and says, "You've earned it": in the original film version, Venkman gives Egon a Nestlé Crunch bar; in the VHS/DVD versions, the candy bar is a Payday. I'm guessing there was a contract dispute with Nestlé sometime between the film release and the video release of the movie
Corrected entry: At the beginning of Ghostbusters, Peter Venkman says that he studies the effects of negative reinforcement on ESP ability, when, in fact, he actually studies the effects of positive punishment on ESP ability. This can be seen in the fact that he adds an aversive stimulus to the subject when the subject "gets it wrong" in order to decrease that behavior, which is positive punishment. If he was studying negative reinforcement, he would have to make the shock occur at all times unless the subject guessed the right card, at which point, the shock would be removed. Of course, Peter's methods were shown to be less than sound.
Corrected entry: In the ballroom scene, when Egon shoots the cake, it explodes seconds before the proton beam touches it.
Corrected entry: In the scene in the hallway at the hotel with the green ghost, the ghost goes through a wall right above a vase of ferns, and about a second later, a cart crashes into the table with the ferns on it. The ferns go up into the air and out of the shot, but they never come back down.
Corrected entry: When Gozar, or the voice of that lady character is telling the Ghostbusters to "choose" the form of their destructor, Peter tells them the example about J. Edgar Hoover and that they need to clear their minds. Well if he was thinking of J. Edgar Hoover at the time, shouldn't he have came out instead?
Corrected entry: When Ray and Winston were driving across the Brooklyn Bridge around midnight in the Ectomobile, Ray quoted a verse of Scripture claiming to be "Revelation 7:12". Although in actuality the verse that contains "...opened the sixth seal...and the sun became as black as sackcloth, and the moon became as blood..." Actually was Revelation 6:12. The writers were one chapter off.
Corrected entry: When Dana tells Peter of the refrigerator incident, Peter opens the door to investigate. On the top shelf is a can of Coke with the label "Coke" clearly displayed. Just a moment later, he double checks the fridge, where the can now reads "coca-cola." Somebody turned the can between shots.