It does move a tiny bit, and keeps moving for a little while before César stops it with his hand with a chuckle.

"We could be here all day if I started listing off the stuff I've made." César laughs, a bit embarrassed as he takes his phone and turns it off and puts it away. "I'm... ah, interested in old history. Our technology timelines seem to diverge in antiquity so far as I can figure."

(And it's partially his fault, not that he knows.)