Continuity mistake: While the fire alarm is blaring, when Harry Potter Sr. Is speaking to Peter Dickinson near the stairs, note the logo on Harry's lopsided hat keeps moving between facing his left side and facing his right.
Continuity mistake: Torok the Troll wears a magic silver ring which allows him to appear in the form of Wendy Potter. However after Wendy's mother tells her about the orange juice, when Wendy touches the cold bottle of milk in the fridge she grabs her arm in pain and we can see both of her hands, and she's not wearing that magic ring.
