"It was an odd thing... I was minding my own business when one day, I bought a car, only the car, it turned out to be an intelligent giant robot from another planet..."
And he told her of the Transformers, of the heroic Autobots and the dark Decepticons, and of their war which nearly ended all life on Earth. He downplayed his part, telling of how he had helped end Megatron, the leader of the enemy, though his face took on a pained aspect as he did.
He did not like to think of it. he had never killed anyone before, nor since, and it still stung, still wiggled in him, necessary or not.