Revealing mistake: When the farmer is going to shoot the sign the bank put up, you can very well see the mark where the hole is going to appear.
Revealing mistake: Inspector Emil arrives at the morgue; pay attention to the body, just before he asks "You are...?" to Armstrong, the sheet covering the cadaver rises and fall as the departed takes a few deep breaths. (00:32:00)
Revealing mistake: When the brown Vanden-plas hits the skip you can see that the cars engine has been removed also the moment of impact is shown twice.