San Francisco’s WonderCon is known to many as the little brother convention to San Diego’s massive Comic-Con. I remember a few years ago being surprised at just how few people dressed up for the Bay-area con. But in recent years, WonderCon has been growing in size and more and more attendees have begun dressing up as their favorite comic book, sci-fi, horror, video game and anime characters. Mark Day has compiled awesome video compilation showing you the many costumed geeks at this year’s WonderCon. Watch it now embedded after the jump.