Shinichi continues to watch his reactions carefully. His mother was a famous actress so he likes to think he's got a good eye for spotting when someone's acting and this doesn't feel like that. He's going to need to rethink a few things.

He frowns a moment and then smiles again. "Put them on for a moment and watch the red dot, okay?" He hands them over and then runs back until he's a few meters away. If Watson is watching he'll notice the red dot seems to be moving away from its center position.