I went on vacation to New Hampshire with my family last summer in late August. We rented a cottage on Hampton Beach. The cottage was fairly new (newer than my house, which is 15 years old) and was owned by a man who lived alone. He used to be married, but his wife died in the house from heart failure, I think. We stayed there for about a week.
Within the week, I could feel the presence of the owner's dead wife's spirit. I would occasionally hear footsteps. There was an occasional odor of cigar smoke, which she could have smoked cigars in her lifetime. For a few seconds, there was major temperature changes, I could feel as if somebody was breathing on me. At night, in my dark room, I would see her shadow. For no reason at night, I would start throwing up. I always brushed these experiences to the side.
On my last night at the cottage, I was home alone. It was about 2:00 am. I was brushing my teeth in the bathroom, with the door closed. Suddenly, there was a very loud "BANG" on the bathroom door. I suspected a robber, so I opened the door and began searching the house. No one was there.
About an hour later, my family came back. Within the hour after the bang, I was still hearing strange noises, such as footsteps and I think I heard her say "William" which was the owners name, but nothing after I fell asleep.
The owner had never warned us about this haunting. Since the events were fairly common, I would guess that the owner would experience events like these. Her ghost was most likely watching over him after her death.