[Aaron nodded in response to the Doctor's gratitude.] It's weird. I remember the last 6 years, but I also remember being here before as though six years didn't pass. So, of course I remembered.

[He glances down at his metal prosthetic before looking back up at the other man.]

Oh, uh...I lost it in a fight with an undead bear.

[And then he laughs, shaking his head.]

See? It doesn't even sound cool. I'm going to have to have a talk with Ivar about that.