He's going to find it a little of both. It's absurd enough to warrant a laugh and a look askance. The part that catches John's attention for the moment, though, is Skyfire mentioning his size. He'd taken 'crashed' to mean 'crash landed in a spaceship.' Maybe he has to travel around in some sort of suit because of the atmosphere? That would be very War of the Worlds of him.

"Sorry, how big are people usually on Cybertron?" It sounded like some sort of computer world.