While waiting for a panel on Universal Studios movies, two men got into an argument that quickly spilled out of control when one of them pulled out a pen and stabbed the other in the face, dangerously close to the eye socket. He was quickly taken away by the authorities, while the wounded attendee was treated by medical personnel. But from this point forward, Comic-Con will always have the reputation of being so hyper-intense, that it could possibly incite bloodshed.
Iron Man, Screaming Fans & Stabbings! The Craziest Moments in Comic-Con History