Revealing mistake: Cottontail gives Tom a wet Willie. However Tom reacts before Cottontail touches him.
Revealing mistake: When Tom is fired from Harrods, he is escorted out of the building. Look closely in the glass to the sides of the doors, mainly the screen right, to see a group of people just stood watching the film crew. There is a slight hint of a barrier visible around waist height but to spot the barrier you have to look extremely closely. (00:17:00)
Chosen answer: Because her house was smashed with a tree.