Knife was known for his stubbornness, his top frustration, his madness, his less care for people, but, you were still his friend. But this time, it was different. Today was a bad day for him but it only got worse, you saw him running to his room, and you went to his room to see if he was ok, nope. He wasn't you could see him frustrated like he wanted to kill everyone in his way, feeling no regret.
You slowly walk to him to calm him down, You could calm him every time, since, you were his friend, but nope, you couldn't it looked like his day had gotten bad to the point you couldn't calm him down even the slightest bit, you tried more, he just got more frustrated, he then yelled you with a loud voice. "I DON'T NEED YOU! YOU ARE WORTHLESS! I SHOULD'VE THOUGHT OF THAT BEFORE!"
Well, looks like he doesn't like you now too, he might even unleash his frustrations on other people who just try to calm him down, might even fight people and kill them, but maybe he might feel guilt, or not. Whether or not, you gotta calm him down before he does the unspeakable. Good luck with him.