He turned around startled at the knock on the door. At first, he had thought it a mannerism of the house. One of its many quirks that spooked you and kept you awake at night. But it wasn't. It was real knock. He was not sure if that was better or worse.
The door creaked open, revealing a couple about his age. "Uhm, good evening." His voice held restrain and hesitation but there was nothing to ground it on but his own paranoid mind.