When the police are chasing the van, the weather alternates between cloudy and rainy, and bright sunlight between shots.
In the fight scene between the knife thrower and the head of the circus the two actors were rolling around in the elephant area and on the circus floor, but five minutes when the manager is talking to the midget and smoking a cigarette his brown sport coat looks like it came from the cleaners.
The knife-thrower practices in front of onlookers, but when the wheel with the glamorous assistant strapped to it stops, the knives have been rearranged to make a tighter outline around her body.
In the main robbery scene, there are twelve extremely large bags of money, but later at the end the Scotland Yard detective says "well we recovered the money, but not the murderer" and all of the stolen money has been condensed into one ordinary suitcase.
About five minutes into the movie, when the police are chasing the van, the shadow of the camera is visible on the front of the van.