It’s hard to believe that Daniel Radcliffe has never done San Diego Comic-Con before, but he’s finally here this year to talk about his new film Horns. Also on hand for the panel today were director Alexandre Aja (High Tension, Piranha 3D) and Joe Hill, who wrote the 2010 book on which the film is based. Radcliffe stars in the RADiUS/Weinstein Company film as Ig, a guy who wakes up one day to discover that he has creepy powers -- and horns that are starting to grow from his head.