[Otto raises his eyebrows. That sounds like a hell of a story.]

I'd ask "on what", but I'm sure I've got the idea.

[The sample set he's managed to collect is very small, from a statistical perspective. From a human one? Yeah, of course, obviously he's evil in that universe too.]

That must have been a strange visit. I know I don't much like the idea of meeting my own counterparts.

[It's something he's considered; there's no reason more of him couldn't end up here too, after all. He doesn't see many scenarios where it doesn't end in a fight.]