wow, totally wasn't thinking about him.

as for the blood clot, i don't think it has any future significants, i think it was mainly to show hiro that there's nothing he can do to change someones fate. say he did save her from syler? she could have dropped dead from an aneurysm walking in from the back room.

that and to give him the "hero push". you know, when someone important dies or is killed and that further motivates the hero to achieve their goal.