During his Charms O.W.L. in June of 1996, Harry Potter confused this spell's incantation for that of the Colour Change Charm. Thus, his rat swelled to the size of a badger instead of turning orange as he was supposed to have done to it.
Behind the scenes
- Given that Harry confused the two spells, it is likely this and the Colour Change Charm have similar incantations.
- Harry Potter and the Order of the Phoenix (First appearance)
Notes and references