That guy in the Spider-Man suit you posed with at Comic-Con? It might have actually been Harry Potter. Daniel Radcliffe donned a Spidey mask to covertly mingle with fans on the showroom floor at the pop-culture convention. “I did an American accent for the whole time,” the British actor said in an interview Friday. Radcliffe posed for plenty of photos with other costumed guests, and even inserted his Spidey-masked face into a poster for “Sharknado 2.”