Chang is dumb. Even for a street urchin from San Francisco in 2000. He believes a guy who dresses like the goddamn Terminator. The Master hypnotizes him for like five seconds, but he's totally cool with everything else. Also, his friends get shot and killed right in front of him, but it never seems to bother him. Maybe he's just too stupid to understand what death means. He stole an ambulance. People probably died because he was out playing real life GTA with his new evil buddy chasing a mental patient and the woman having a breakdown because of him on a motorcycle.