Jokermingo's Death

In the episode 5 of Microsoft Sam and the Great Final War, while traveling back in the past in the alternative universe, Sam corner Jokermingo and shoot him in the knees. After manges to convince Satan and Devil's Hell Star to be on his side by telling them the truth about Jokermingo's plans, mainly that his invention will killed both of them, Sam then proceed to kill Jokermingo by throwing him into hellfire, while the villain can only begging helplessly as he was burn to death. This action erase him and undo all of his doing at well as alter almost everything that happens in the present day (at least in the alternative universe).

Example of:
Asshole Victim