Spooky!

A seance, originally uploaded by National Media Museum.

The caption reads: "A photograph of a group gathered at a seance, taken by William Hope (1863-1933) in about 1920. The information accompanying the spirit album states that the table is levitating. In reality, the image of a ghostly arm has been superimposed over the table using a double exposure."

There's lots more fun pics of spooky stuff in the National Media Museum's photostream.