Houses saw Professor Flitwick carrying a tall pile of books in the corridor and refuses to accept help; insisting he can 'manage'
Gryffindor: Sir, maybe...maybe I should do that because I'm—you know—er—taller?
Ravenclaw: Are you sure, sir? *is guilty to feel more concern about the books and is vigilantly on guard ready to catch one in case they fall*
Hufflepuff: Sir, just a little help won't hurt—just two books, I guess. I'll just carry two books, sir...
Slytherin: Really? You're really brilliant, sir! *puts his schoolbooks at the top of the pile* And I'm sure you can carry these, too!