[He's not sure how he expects Kakashi to react to everything he's said. He's not even quite sure why he gave away so much except the fact that his history isn't really a secret. So he gives the other man a few moments to process it all. He's mid-gulp when Kakashi finally replies and he nearly chokes. Nearly. That would have done wonders for his image, he's sure.

Shaking his head, he sets his bottle down with a small, bitter smile.]

Not true. I can be killed just like anyone else. A bullet to the head or chest will do the trick just like anyone else. What happened to me was...I don't know, some kind of freak accident. We're still not sure how the serum allowed me to survive, much less how it did all that and left me without aging a day.