Once, during the middle of the night, I was in the restroom which is right next door to our bedroom. I heard my guy cough a particular cough he has as he walked past the bathroom door. I left the room within a minute of his passing by, walked around the corner, and he was sawing logs. It hadn't been him. In the morning I asked him about it, and he swore he hadn't gotten up at all that night!
Not long after, around the same time of night, I was again in the restroom and I heard my guy say, "What are you doing in there?", which he had a habit of saying whenever I was in that room. Again, I exited within a minute, and again, he was out like a light! Both times the ghost sounded EXACTLY like my guy, and both times he was walking towards the bedroom past the door. It's always a little chilly in that area, but I tended to put it down the the crosswind from the bedroom across from the bathroom. Seems I was wrong.
George, as I decided to name him, gave me one final 'hey, I'm here' one day when I was in the garage doing laundry. The outer wall is immediately to the right of the appliances, and the door to the back yard is right there. I can look out the window as I'm putting clothes in. We keep the gate locked and the puppy was ever-watchful of anyone coming near and would sound the alarm, so I never worried about keeping it locked or even closed sometimes.
So I'm loading the washer one day and suddenly there's a double knock on the door! I immedately turned, no one was there, so I yanked open the door...no one. The knocking was unmistakable and very loud. Scared the daylights out of me! I looked to see if there was anything I could attribute the sound to, but there wasn't.