You quickly started firing the yellow pellets at Mettaton. He did flips and turns to dodge them, but a few still hit him. You had decided to take off his limbs, it wouldn't hurt him because he was a robot, and then you could walk right past him.
But as the fight went on, you felt more and more like you were…
Having fun?
The dancing, the lights, the camera, it all made you feel like this wasn't a fight.
It felt like a dance.
It felt like a challenge.
It felt like a game.
Because, what was the point? You could just come back and try again if you lost. Why not have a little fun this timeline?
So you dodged tiny Mettatons and danced on the dance floor. You wrote a very well-written essay on your favorite thing about Mettaton - his strength - and bragged to the camera about how you wouldn't get hit at all. You were having fun performing for your audience. It seemed like it was a show, unfolding before your very eyes.
And what's a show…
Without a plot twist?
You wanted to surprise the audience, so you did the first thing that came to your mind. You brought out your knife and stabbed Mettaton. Over.
And over
and over.
You were still in the zone about killing Mettaton, so you walked over to the camera.
"Sorry, folks. The old program's been cancelled!" You told the audience, "But-"
"CH- I mean, FRISK! Snap out of it! Why did you kill Mettaton?"
You turned to Flowey. You looked down at your hands. They were covered in dust.
You killed someone.
YOU KILLED SOMEONE!
Quickly, you summoned the Load button and pressed it.
You were back to when you had just snapped out of the fear of Mettaton. Flowey was staring at you, not saying a word.
You could still feel dust that wasn't there on your hands.