Continuity mistake: When Adam and Barbara are sleeping, they awake to a sudden commence of the whole house shaking. There is one close shot of the items on the mantelpiece. Watch the items. There are reels of cotton on the centre of the mantel which vanish between shots, and in the wide shot a book has appeared in front of one of the photo frames, which wasn't there beforehand. (00:12:50)
Continuity mistake: At the end when Beetlejuice is sitting next to the witch doctor he throws the number on his lap. When the doctor picks it up it's beside him on the chair.
Continuity mistake: When the Deitz family and their guests are eating, the bowls of shrimp are sitting on small mats. Delia and Charles's mats often change from black to grey colour, at random through the whole dinner scene. (00:48:45)
Continuity mistake: When Barbara picks Beetlejuice up from the model town, in one shot his arm is wildly shaking around in fury, but in the next close-up his arm is now tucked in between Barbara's fingers. (00:59:05)
Continuity mistake: After Betelgeuse knocks down the model tree, Adam places it back into its hole. Later on, as the camera zooms in on the whole model, you see the tree is still on the ground.
Continuity mistake: During the scene where the new family eat dinner for the first time, there are candles in front of the dad (they are in metallic candle holders). They are in an order like large, small, medium. But in the close up shot of the dad they have changed places to medium, small large. The sizes may be different but the concept of the mysterious shape shifting candle holders is the same. (00:19:55)
Continuity mistake: When Charles and Delia are sitting out on the white terrace, Charles holds a glass with brown coloured drink in it which is three-quaters of the way full, and Delia's glass is half full. When Otho walks onto the terrace, Charles's drink is clear-coloured and the glass is filled right to the top, and Delia's glass is now three-quaters of the way full. (01:01:35)
Continuity mistake: During the scene where the Deitz family and their guests get possessed to sing and dance along to "Day-O," the positions of the black and white napkins, the wine glasses, the cutlery, the wine bottles in the ice-buckets, etc., change many times throughout this completely hilarious scene. (00:50:20)
Continuity mistake: The photos Charles is holding of the Maitlands in sheets are 35mm photos based on the shape of the photo. The pictures Lydia took of them were Polaroid which are square and not as detailed or sharp as the other pictures, much less the same shape even if they were blown up.
Continuity mistake: When Barbara shows that they have no reflections by moving the horse in front of the mirror, Adam is seen waving his left hand (in the over-the-shoulder shot) and it cuts to a longer side shot as he's finishing waving his RIGHT hand. (00:09:15)
Continuity mistake: During the dinner party scene, the positions of the shrimp which hang around the small colourful sushi bowls often change. Sometimes they hang over the bowls, sometimes inside the bowl. This happens with Delia's shrimps especially. (00:48:55)
Continuity mistake: As Adam speeds towards Beetlejuice's foot in the miniature red car, the amount and position of plaster and rubble around Beetlejuice's foot changes between shots. (01:20:40)
Continuity mistake: During dinner, Otho is speaking and Delia listens, her hand away from the glass on the table. A shot later she is drinking from it. (00:51:20)
Continuity mistake: In the Day O scene. Lydia is sitting at the table next to her father. When the possession takes place, Lydia is not longer at the table and in a brief moment is seen in the corner hiding, laughing behind her chair. The camera closes in on the song and dance, and when pulls it back Lydia and her chair are gone and the corner is empty.
Continuity mistake: Adam picks up his head from the table and puts it back on. In the following shots the blood around the neck and head has disappeared.
Continuity mistake: At the start, when Adam drives to the store a fireman is cleaning the right side of the fire truck. A shot later he's now cleaning the front part. Also, when he exits the store the two firemen swap places between shots.
Continuity mistake: As Barbara recoils after getting hit with the steel plate over her mouth, she starts to move back just before, and repeats the move just after, it appears.
Continuity mistake: When Beetlejuice is screaming at Barbara and Adam, he kicks over the model tree. As he does, his hands are close to his sides. In the closer shot, they're a bit further out from his sides in preparation of the crotch grabbing joke.
Continuity mistake: When the wedding clothes are laid out for the seance, there are no pants/trousers in place for Adam, but when he materialises he has them on.
Continuity mistake: When Charles is looking out of the window, he pushes one slat of the blinds upwards, and then bird watches with his binoculars. When Lydia comes in and makes him jumps, he turns around, and this particular slat falls back downwards, into place. But in the very next shot this same slat is pushed in an upwards position again. When he sits back down again as Lydia leaves, the slat is back down again. (00:27:35)
Answer: Italy is the center of the Roman Catholic Church, which includes exorcisms as a real-life ritual. Presumably, ghosts in Italy are at greater risk of encountering trouble in Italy because of this reason.