For once there's little Humpty Dumpty can do to mask the reaction to hearing that revelation, a range of emotions flitting across his face in succession. There's confusion followed by anger followed by a prickly glare that he quickly tries to reign back in to that previous stare of skepticism.

"You're lying."

But he... Doesn't sound certain. Because he's been here long enough to have learned of other worlds; places where technology is either far ahead or far behind that of his own home, worlds where vampires have never even existed, worlds where people have been brought from other times. It's not impossible and he knows it.