Question: Both the movie and book make it seem like Harry did a merciful act by sparing Peter Pettigrew's life and trying to take him to the Dementors instead. It even created a life debt that made Peter hesitate to kill Harry later on (during the "Deathly Hallows" events). But having your soul removed by a Dementor is supposed to be a fate worse than death. How has Harry been merciful at all?
Question: This occured to me after watching all the movies. Until the end of this movie, everyone thought Sirius Black supported Voldemort. Therefore, if Severus Snape wants Voldemort to believe that he is loyal to him and is only faking his allegiance to Dumbledore, why does he attempt to capture Sirius and turn him over to the Dementors? Wouldn't he have to explain to Voldemort why he attacked a fellow servant?
Question: Why is there another flight of stairs going up from the Fat Lady's portrait when there are only supposed to be 7 floors on the Grand Staircase? There's also another flight of stairs going up higher in the background (behind Harry and the others) when the Fat Lady won't allow the students in until she's broken the glass with her voice. Is there an 8th floor we're not hearing about?