He got thrown across the anti-magic barrier and he was dying from the injury that originally killed him when he turned into a vampire. I reacted on instinct and, instead of pulling him back over like Stefan did with you, which probably would have killed him before we could have made it, I...treated the injury. I had no idea it was going to make him human again. I just didn't want the guy I was kind of dating at the time to die. It was mostly adrenaline and...yeah...dumb luck.
He deserves all the good things he can have. He's a great guy.