In November of 1771, Newcastle-on-Tyne was hit with an enormous flood after heavy rain. Much damage was caused along the riverside, and hundreds of people were swept out to sea--the flood struck in the early morning, and caught people still in their beds.
Now in 1975 a Scottish woman arrived in Gateshead, knowing nothing of the town's history. In a letter to the author of the book I'm quoting from (Peter Robson, Grisly Trails and Ghostly Tales, 1992) she claimed to have the gift of second sight, and that it had been passed down through her family for generations. Anyway, to quot directly from the book, "Yet one Sunday in November she was standing looking down from the High Level Bridge towards the bustling Quayside Market...She looked down into the river...She could see no water at all, just thousands of people crying in pain, begging for help, all raising their hands and moving like liquid down towards the sea. She could hear a thousand screams, all drowning and in torment....Every time she crossed the bridge the same thing happened...."
Now that was a timeslip--where an intensely terrifying event has been recorded in some way by some natural process which we don't understand as yet, and replayed over and over on the anniversary of its occurrence.