Daniel Radcliffe's stunt double was seriously injured during pre-production tests for an intricate scene in Harry Potter and the Deathly Hallows at Leavesden studios in England Wednesday. A witness told the London Daily Mirror "He was rehearsing a flying scene which involved an explosion and it seems to have gone badly wrong. The guy was rigged up to a harness for the scene and was flying through the air. It is thought he may have been caught by the explosion and hit the ground very hard. He told crew members who went to help him he couldn't feel anything from the waist down. Everyone is just hoping he makes a good recovery. It has come as a terrible shock." The name of the stunt double was not disclosed.