Duration: 34.7s

After me. Riddikulus! STUDENTS: Riddikulus! LUPIN: Very good. A little louder and very clear. Listen: -Riddikulus! -Riddikulus! -This class is ridiculous. LUPIN: Very good. So much for the easy part. You see, the incantation alone is not enough. What really finishes a boggart is laughter. You need to force it to assume a shape you find truly amusing. Let me explain. Neville, would you join me, please? Come on, don't be shy. Come on. Come on.