"1940's?" There's an incredulous tone, there, but it's more to the time difference than not believing him.

"This is..." Interesting? Peculiar? Worrying? All of the above? Yes. He shakes his head. "Do you know how this happened? I mean, time travel is possible, but none of the conditions were present where I..." A pause. "When I was."

This seems... either random, or planned.