When Vinnie is reading Starburst magazine in his cab, the position in which he is holding the magazine changes between shots.
When Jana is standing in the corridor of Bret's apartment, it looks darker than it looks in the other shots.
When Vinny is arriving at the castle at the end of the movie, it's clearly not night, but in the next shot it is.
When the guy who gave Vinny a lift says yahoo and goes away in his car, it's obvious he is not driving off at the same moment because scene doesn't look the same.
The fictional film "Caller in the Night" is credited to "Stanlee Kline" on the marquee but to "Stanley Kline" during the movie's opening scenes.
Obvious doll when woman falls from the tower.
A crew person can be glimpsed laying down on the ground throwing fake blood up at Brett while Vinny is slashing him with a chainsaw.