Continuity mistake: When they're all fighting in the Mayor's office, the mug on the desk changes its position between shots.
Continuity mistake: When the guys blast the glass lamp in the hotel, it falls on a table and messes up the table and chairs around. In the following angle the chairs are in a different position and the area, which was dark half a second ago is now perfectly lit, without anyone having moved and, most important of all, after the big lamp has been shred to pieces.
Continuity mistake: In the first scene the librarian is pushing a cart of books. In one shot both her hands are gripping the back but in the next shot her left hand is holding the top shelf. (00:00:50)
Continuity mistake: When Ray and Winston are driving back to the Ghostbusters' office, Winston (who is driving) is wearing coveralls; when they arrive and get out of the car, he is wearing just a shirt and trousers.
Continuity mistake: At the hotel, when the Ghostbusters blast the cleaning lady's trolley, the stuff on the floor changes between shots. Watch the toilet paper on the far left, for example.
Continuity mistake: At the Lincoln Center (that place Dana's orchestra plays at) the nerd with her has his case and they're leaving when Peter is there. Nerd-boy goes off to the side and waits. When they start off again, his case pops back and forth unhumanly between being carried under his arm and in his hand between long and close shots about 3 times. (00:44:34)
Continuity mistake: When the Ghostbusters arrive at the skyscraper, a guy with a bulky walkie-talkie appears/disappears between shots.
Continuity mistake: During the earthquake, after the ground swallows the police car, the crowd to the left disappears, only to appear half a second later.
Continuity mistake: When Venkamn picks up slime from the library's drawer, the wood is first partially dry with chunks of slime, but a frame later appears all wet with no slime.
Continuity mistake: When Dr. Venkman is looking in Dana's refrigerator the items on the top shelf shift position, disappear and/or are replaced with other items. The large glass dish that was on the left of the Coke can is replaced by a small plate of food. The Coke can turns. There is also now a large bottle behind the Coke can. Clearly these 2 connected shots were filmed on different days and the items were stocked without regard for the previous shots items and positions.
Continuity mistake: When Ray first tries the fire pole at the station, he is holding it with his left arm with his right hand on the wrist. When he hits the floor, he is holding the pole with his right arm under his left arm.
Continuity mistake: When the 'disgusting blob' goes through the wall above the vase of ferns after being attacked by Ray, you can see two small amounts of slime appear on the wall. In the next scene, when the food trolley crashes into the table, there is more slime on the wall than there was in the previous shot.
Continuity mistake: Venkman meets Dana by a fountain. When he says goodbye to her, first a man with a hat passes behind him and disappears in the next angle; then, in a close-up, Venkman is surrounded by dozens of people who vanish half a second later in the wide angle, where the place appears empty.
Continuity mistake: When Venkman is doing the tests trying to flirt with the blonde student, when she says that the figure on the card is a star, Venkman is first holding the card with his thumb and two fingers. But from the back angle, four fingers are seen extended.
Continuity mistake: When Egon tries to prevent Walter Peck from shutting down the protection grid, he has Janine and Vinz (Louis) behind him. You can see that Vinz is raising his right arm, but in the next shot his right arm is now lowered down.
Continuity mistake: When Dr. Venkman investigates Dana's refrigerator, there is a Corning dish and a can of Coke side-by-side on the top shelf. The camera cuts twice, and there is suddenly another item (looks like lunch meat) that appears in front of the Corning dish and the Coke can.
Continuity mistake: When the Ghostbusters capture the green ghost, they emerge from the ballroom. The manager then asks,"Did you see it? What is it?" and you can see he has his hands by his side, but the next shot shows him with his left hand reaching for the handkerchief in his top pocket.
Continuity mistake: In the scene where the earthquake begins, the Ghostbusters fall into a hole. They're in two rows - in the first row are Venkman and Ray and in the second row are Egon and Winston. In the following shot, it is now Ray and Winston on the first row and Venkman and Egon on the back row. (01:20:30)
Continuity mistake: During the party, when Louis throws the coats on the gargoyle's head, its horns are visible from the front shot, but covered in the immediate angle from behind.
Continuity mistake: When the eggs are flying in Dana's kitchen, she approaches the counter and comes inches away from it, yet from a wider angle she is several meters away.
Answer: He places it on the altar just after they believe they have vaporized Gozer with the proton packs. At this point, thinking the ghost to have been destroyed, he sets it down as he believes the job is done and he will not need it.
Jazetopher