Revealing mistake: When Barbara and Adam are digging up Beetlejuice's grave, you can see that a piece of cardboard states "FRAGILE" or something in small print which is proportional to Barbara and Adam at that time. However, the lettering should be ten times larger if the cardboard was proportional to the actual model.
Trivia: In 1990, a script was written for the sequel; it involved the cast of the first film going to Hawaii. Burton and and the cast were set to return, but the cast would only come if Burton was involved. He became to busy with batman returns and eventually gave up on the idea. The script is still owned by The Geffen Film Company till this day.
Question: What's up with the afterlife? After they die, they somehow walk back to their own home and when they walk out, they're on some desert planet with giant sandworms. Now, their case worker Juno says they have to stay in the house for 125 years. Why do they have to stay in the house for 125 years and for what? Is there a Heaven or Hell in this movie?