What I did during the Genocide Route:
I laughed when Toriel died.
I smirked when Papyrus died.
I giggled when Undyne the Undying died.
I had a moment of silence when Muffet died.
I boasted when Mettaton NEO died.
I rolled my eyes when Sans died.
I shrugged when Asgore died.
I burst into laughter when Flowey died.
I smiled when Frisk died.