Spider-Man, Mickey Mouse and other famous characters paid a special visit to a Chicago boy this Christmas season. Clareon Williams, a 5-year-old who has been in medical care since November after being struck by a stray bullet that a mystery gunman fired into his home, was surprised Tuesday when superheroes and cartoon icons arrived at the Comer Children’s Hospital to drop off presents for him. "This is what Christmas is about, bringing kids’ dreams to life," Early Walker, the president of I’m