Enter the dragon ..exit Harry Potter.
He had to slide down a 50ft roof to battle the dragon as part of a Triwizard Tournament challenge to steal a golden egg.
Daniel, 16, said: "I was on a wire going so fast that my mind didn't have time to catch up with my body and go, 'Wow, I'm falling.' "It was fun after the first take. But at the beginning, I was absolutely terrified."
The fourth Potter film is released in November and promises to bethe scariest yet. During one challenge, Harry has to rescue his best friend Ron Weasley (Rupert Grint) from the bottom of Hogwarts Lake where he is being held by the Mer people.
The climax is an all-out battle between Harry and the evil Lord Voldemort.
Voldemort, played by Ralph Fiennes, right, is seen for the first time in human form and is sure to terrify young fans.
But there are some lighter moments too, including Hagrid (Robbie Coltrane) finding love with Olympe Maxime, a fellow half-giant who is headmistress of the French wizarding school, Beauxbatons.
Actress Frances de la Tour, who plays Madame Maxime, said: " You see a lot of tenderness. It's lovely