That's a horrible, terrifying sad way to go out. Oh gramps, you slit your stomach but no one was there....he died alone, in unimaginable pain, and alone. I couldn't bare that level of guilt he must have felt in those moments, he probably felt that he failed as a teacher, and that, that is something hardly anyone could handle alone. And yet he did, all alone. And he died alone. You know what, fuck that demon up Zenitsu.
FUCK EM UP ZENITSU. FUCK HIM ALL THE WAY UP.