When Louise is hitting her father in the face with the chocolate cake, there is a mirror behind them.
In the mirror you can clearly see the cameraman's legs - he's wearing white tube socks and dark shorts.
In the scene where Louise pushes her father, played by Ray Milland down the hill, you can see that Milland's stunt double looks nothing like him.
He is a man with brown hair and a beard, when Milland was completely bald in the film.
.JPG)
