So like he insane bro

"Your in the underground [either be frisk/chara/papyrus], exploring the places like the snow din if im sure if thats what its called, suddenly after walking for a bit, you see a body.. of uh.. berdly?.. how theee .. your scared a little.. not knowing where it came from, you just continue walking, its getting more foggy, all of a sudden, you feel something crawling behind your back, you slowly then turn around, and its THE SCARY 3 AM SANS CALLED INSANITY SANS!! OH NOO.. you get scared, cause he of course killed T h e m . You try running away, but.. its too late.. you cant run nor hide. you have to fight."

Sanity sans: no
Insanity sans: yes!
sMASH?: idk