I still haven't had a chance to see Chamber of Secrets, but The Sorcerer's Stone was on TV today, and this thought occurred to me: How could there possibly be any rodents within 50 miles of Hogwarts with all of those owls flapping around?
And yes, I appreciate how silly it is that I'm able to suspend my disbelief for the rest the Harry Potter universe, but that point snapped me out of it.