Continuity mistake: When Eddie says they are playing with a deck of 12 cards, his sleeve is half covering his watch. In the next shot the sleeve has moved much further down his arm.(00:02:10)
Continuity mistake: When Richie looks under the duvet in the house next door, his hands change positions between shots as he holds the sheet up.(00:25:05)
Continuity mistake: When Eddie tries to electrocute the gas man, he shocks him on his bare chest. In the next shot, the gas man's tie has moved back to the centre of his chest.(00:13:45)