"First rule of magic, got it." Focus and willpower were the key and obviously the man wasn't an original Star Trek fan since the Squire of Gothos hadn't gotten a reaction.
"I'm John Constantine by the way." Usually he wasn't the one remembering to make the introductions. He had somewhere along the way ended up with a pocket full of business cards again so he slipped one out of his pocket to hold out to his new acquaintance. John Constantine, Exorcist, Demonologist and Master of the Dark Arts.