Try to look along the walls and wherever there is a dark spot of floor. Is your cage mounted up on something like a dresser? I would definately look behind it and along that entire wall. Snakes like to find a wall or something smooth to kind of direct them where they're going. I've never had an escape, but these tips seem to have helped people in the past. How big is he? I would look ANYWHERE that looks "comforting" to a snake i.e: an open backpack or bag, a shoe, a box, just look EVERYWHERE!!! But I know you are! Good luck!!

Jennifer