"'Do I now' what?" That response doesn't make sense with anything he said, but he's already surmised she's not listing. "You don't know what the fuck I'm doing with the rest of my time! All you've done is argue with me since the beginning!"

He's not intimidated in the least, and will yell right back in her face.

"Who the fuck do you think you are equating one thing I'm doing today with not giving a fuck if people die!?"

She's gone far off into extreme hypotheticals, and now he's pissed.