"I was in orbit," Optimus confirms, this time his holoform reflecting some of his irritation, "leaving Earth's gravitational pull. The next, I was stumbling on to the grass, much like you were."

This is incredibly vexing. In a very human gesture - perhaps one of the few he's mastered - his holoform reaches up to rub the bridge of its nose.

"The construction here would suggest a multitude of inhabitants," he continues, "but I have seen only one other human. It is...empty, here."

He doesn't seem to consider this a good thing.