Robin Hood (starring Errol Flynn) - He Must Have Been Hungry
Go to the scene where all the Merry Men are eating and feasting. Robin has a large mutton joint that he is eating. The movie cuts to a shot of Maid Marian eating something. When it cuts back to Robin eating a few seconds later the mutton is almost gone.
This is my slip-up and I just want to add that if you look at the coins that the men are playing with none of the coins have heads or marks on them. They are just round pieces of metal. It looks very funny.