Revealing mistake: In the scene where Chitty is taking off from the castle, Caracticus looks down at the toymaker and Peter and says, "Bye bye". If you look closely, right in front of them, a boy runs across holding a stick he stole from one of the cavalrymen. He is waving it around and you can tell it's fake because it flops around like rubber. (02:16:50)
Revealing mistake: When Carole and Jim rush out of Herbie to find Thorndyke under the bonnet, you can see that Carole is not Michele Lee but her stunt double.
Revealing mistake: When we first see Oliver Reed, we see his shadow first on the wall at a ramp to the pub. As his shadow spreads its legs, we then see him spreading his legs a moment later. Shadow puppetry was used by the director to give the audience the impression that he is ominous and foreboding before we ever see the man himself. (00:54:10)
Revealing mistake: When Philip is in the bathroom at the new house Mike puts toothpaste on his toothbrush and then Philip smiles to reveal missing teeth. Look closely at Philip's teeth and you will see that they are not missing at all - there is black paint on his teeth to make it look like they are missing. (01:14:40)
Revealing mistake: When Woody and Sharon are singing their 'Ol Devil Moon' duet, Sharon starts to sit up, but then the shot suddenly changes to them both sitting up, Woody in a fade behind her as she sings.