Approx 5 minutes in, Diana and Gillian are having a conversation outside the college. In the background is a green double decker bus. The shot cuts away to Matthew, when they cut back to the girls the bus has gone, but it didn't drive past them.
The witch wind was so strong that it knocked the other witches and even a Vampire (Matthew) from their feet yet aside from the papers blowing around no other objects moved (tables/chairs)