Brendan took her shoulders and forcibly turned her toward the pool of water. “Look at that water, Mickey. Look at it. Have you ever seen water poured in that perfect a circle? That’s a characteristic of pools of water in the literature.” (Alexandra Sokoloff, in The Unseen)
Mysterious pools of water are frequently reported as part of poltergeist activities, according to a number of sources. See here for some typical examples.
Intrigued by the words “Have you ever seen water poured in that perfect a circle?” I have begun to research the subject. But I’ve barely scratched the surface.
Sokoloff, Alexandra. 2009. The unseen. New York: St Martin’s Press [p241]