"If you want to follow me around with flags, I would appreciate it," he says. "Just don't knock loose any of the ones I've already placed. I need all my markers in place to keep my scans accurate. Everything else is too specialized right now, sadly."

He gestures towards a pile of loose flags and stakes he's got on the ground. He wishes there were more he could have her do, but his tools are so heavily integrated with his brain that he's the only one who can set up the measurements he needs.