Hagrid: If that dolt of a cousin of yours, Dudley, gives you any grief, you could always, um, threaten him with a nice pair of ears to go with that tail of his.
Harry: But, Hagrid, we're not allowed to do magic away from Hogwarts. You know that.
Hagrid: I do, but your cousin don't, do he?
Harry says goodby to Hagrid at the train.