A time slip is a paranormal phenomenon in which a person, or group of people, seem to either travel through time via unknown means, or appear to briefly enter an alternate version of present reality via unknown means.
Some time slip witnesses report that, at the start of their experience of the phenomena, their immediate surroundings take on an oddly flat, underlit and lifeless appearance, and normal sounds seem muffled. This is sometimes accompanied by feelings of depression and unease.
Moberly-Jourdain Incident (1901) - Two women (Charlotte Anne Moberly and Eleanor Jourdain) visited the Peitit Trianon in the grounds in the Palace of Versailles where they allegedly experienced a time slip, and saw Marie Antionette as well as other people during the same time period. In an account, Moberly describes:
“We walked briskly forward, talking as before, but from the moment we left the lane an extraordinary depression had come over me, which, in spite of every effort to shake off, steadily deepened. There seemed to be absolutely no reason for it; I was not at all tired, and was becoming more interested in my surroundings. I was anxious that my companion should not discover the sudden gloom upon my spirits, which became quite overpowering on reaching the point where the path ended, being crossed by another, right and left…Everything suddenly looked unnatural, therefore unpleasant; even the trees behind the building seemed to have become flat and lifeless, like a wood worked in tapestry. There were no effects of light and shade, and no wind stirred the trees. It was all intensely still.”
And Jourdain describes:
There was a feeling of depression and loneliness about the place. I began to feel as if I were walking in my sleep; the heavy dreaminess was oppressive.
The Vanishing Hotel (1979) - Two English married couples drove through France en route to a holiday in Spain. They stayed overnight at a hotel - which didn’t exist. They described the hotel as being curiously old-fashioned; the furniture was made of heavy wood, the windows were merely shutters, there were only wooden catches for locks on the doors, the bed sheets were made of calico, there were bolsters with no pillows, the plumbing was antique, and there were no telephones or elevators in the building. Photographs taken during their stay were missing, even from the negative strips when the pictures were developed.