Recently, you had fallen into the underground, and decided it would be very smart to attempt a Hardmode genocide run. it was going well so far, you had just made it out the ruins and you walking through snowdins forest, unlike the other resets how ever... you see Sans at the bridge with his back turned towards you. He then starts speaking.

Hardmode Sans: So, you thought I wouldn't notice you early, did you?

Sans turns around to face you. You feel like your going to have the worst time of your life.

Hardmode Sans: I heard what happend to that lady I talk to behind that door, you killed her, with absolutely no mercy. So, in this case.

Sans telekinesis your mercy button in his hands and destroys it.

Hardmode Sans: You won't be getting any mercy from me anytime soon you little brat.

You have two options, either run, or fight this... Hardmode version of Sans.