Storm troopers cavorted with zombies, Steven Spielberg chatted with Peter Jackson, and the stars of “Cowboys & Aliens” swooped into San Diego, making for an action-packed Comic-Con. The 42nd annual fan festival closed Sunday after four days of pop-culture indulgence. More than 120,000 people attended the event at the San Diego Convention Center, which spilled over into downtown San Diego. Costumed characters strolled the streets and empty storefronts were transformed into special attractions such as the Sega Arcade and Monstergeddon, which mixed Marvel characters with monster trucks. Inside the convention center, comic books, toys and splashy displays touting upcoming games, movies and TV shows packed the exhibition floor while panels for various artists, programs and films continued nonstop in dozens of ballrooms and meeting halls. “This is a place for people who aren't embarrassed to celebrate all this nerdy stuff,” said Blair Herter, a host of the G4 Network's pop-culture program, “Attack of the Show!” ‘'These people have a harder time being this excited about this stuff in their everyday lives, so this is just a giant well of acceptance we're bathing in.”