This doesn't happen in the book, where Ron merely wonders how she is getting to all her classes and it isn't explained until the climax.
The feeble, elderly member from the Committee for the Disposal of Dangerous Creature never appears.
He does appear in the video game, though. In the equivalent scene from the book, Harry, Hermione, and Buckbeak managed to escape from the werewolf without a fight.
Harry Potter and the Prisoner of Azkaban contains examples of:
