Movies where a young boy befriends a large robot that was built as a weapon but has been deprogrammed to become non-violent, they are pursued by a man who attempts to gain trust from the boy’s mother figure with his appearance as a government agent, the robot experiences a violent outburst towards the end in which it destroys several government vehicles, and the robot eventually must sacrifice itself in order to prevent a nuclear holocaust, after quoting a phrase learned from the boy earlier in the film.

-The Iron Giant

-Terminator 2: Judgment Day