Other mistake: When Martin Short accidentally fires a shot into the bank ceiling, he is holding the gun at an angle. However, plaster drops on him from directly overhead instead of from where the gun was aimed.
Other mistake: Lisa hits Mimi right in the face with the flying kick causing her to bleed, but none is on her or the mat once she's laid out.
Other mistake: In the scene at the beginning, when the robbers take Harold's wallet, the robber who had the gun says "American express card" but, when he says "don't leave home without it" the subtitles say the goon on the left says it, even though you can see the goon on the right move his mouth. (01:04:30)
Other mistake: When Loti is shot three times, all three bullet holes appear on her at the same time.