If you are looking for an officially released Prisoner of Azkaban extended edition (similar to the Lord of the Rings Extended Editions or the Sorcerer's Stone/Chamber of Secrets Ultimate Editions),
Extended Scene: During the Boggart lesson, we see Parvati Patil facing the creature. It turns into a mummy. Then, the camera lingers on Neville Longbottom . The Boggart turns into Severus Snape. Neville casts Riddikulus , and Snape is suddenly dressed in his grandmother’s clothes. The class laughs, but the scene ends with Lupin giving Neville a reassuring nod, emphasizing Lupin's nurturing teaching style. If you are looking for an officially released