When he was hired, they told him his job was to watch the Big Red Button, and ensure nobody pressed it. That’s it. He took his job very seriously.
Later, his boss brought in someone new. “Her job is to press the Button if told to.”
So he killed her.
He was being interviewed for his dream job, for the fourteenth time.
Things were going well, until he made another mistake.
So he used his TimeCo device again, and rewound back to the beginning of the interview, aiming for perfection.
What he didn’t know: the post had already been filled.