I have. One time I was at a friends house that was haunted and I did not know it. I saw a woman going back and forth down the hallway and looking out the back door then returning to the bedrrom it came out of. She looked to be in her 40's and had a look of worry, like she was expecting someone at the back door who was late or something. She was a gray transparrent color with a dress on and shoulder length hair. I did not freak out because I did not feel threatened. It was like she did not even know we were there, while she was reliving something. It was one of the first times I could really see detail in clothing, hairstyle etc. I was not scared but at the same time could not believe what I was seeing. I was facing the hallway, sitting on their couch and the owner(my friend) had their back toward it.......It went on for about an hour then during our conversation I just had to change the subject and I said to my friends............OK guys, what is up with the woman running back and forth down your hallway, looking out the back door?.....then, they asked me.., you mean you can see her....I said yes, she is right there and has been there for the past hour...............well they have only seen her a couple of times the whole time they have lived there but they hear footsteps often during the night..............Heck I watched her for about an hour before I mentioned anything to her. My friends said that they are not sure of the history of the house but it never bothers them, it just appears from time to time. I have experienced other things in my life and I know there is stuff out there that cannot be explained, Tim