[The skeleton is certainly thrown off - by the situation of finding himself here, of dying so suddenly, of trying to maintain a conversation while grappling with his own feelings - but he has no cause to expect this to be an afterlife shared by multiple worlds. That's too scifi a notion to jump right to mind. So instead, he looks politely skeptical, like he's only vaguely humoring the human's claims.]

Yes, it didn't seem like most humans I met really believed in us anymore, either... Some thought we must have all died long ago, sealed away like that... And some even thought we were only stories? Ridiculous, but I guess I can't blame them too much.