I mean, you know, unless they were high or something. Which he wasn't... Maybe. At least not completely stoned. Graham had his 'ID badge' in his pocket. On a lanyard. A Star Wars lanyard to be more precise. But he wasn't wearing it. That would be too easy.
"what?" He repeated. And yes, at least it wasn't unicorns. Graham gave a look back to her. Moving to nod toward the computer parts on the desk, above him, he sort of explained himself, "I'm fixing this computer. I'm going to put that hard drive into this computer. It should work better, then. Someone said it was giving the blue screen of death."
So yes. He had been messing with her. He was really just there to fix a computer. That was much more boring than leaving secret notes for his invisible rabbit friend.