Harry Potter star Daniel Radcliffe was visibly moved while discussing the tragic accident that left his stunt double, David Holmes, paralysed during the filming of 'Harry Potter And The Deathly Hallows Part 1'.The life and career of Holmes, a former gymnast from Essex, is the focus of a new documentary titled 'David Holmes: The Boy Who Lived', a nod to the nickname of the character Harry Potter in the popular film series and books by JK Rowling. In a sneak peek shared by HBO, Danielle remembers David as someone who "would do the most dangerous physical stuff" on the set of the Harry Potter films.