actually, to his credit, he got the "I've had worse" achievement for not getting hit with any ghoul explosions. Pretty fkn amazing, since when I did it (this makes 2 now, reset was just a while ago) I got hit by almost everyone and healed my ass off LOL. There is no specific achievement for finishing Heroic ToC, just for killing all the bosses.
OH and BTW! 2 kills tonight for Black Knight!! =)