There is always a rational explanation...

If you believe in the paranormal you might not be surprised if you hear stories of deceased loved ones appearing during the night, huge explosions heard just as someone is drifting off with no obvious cause, and other peculiar occurrences.
But what if you don't?
My interest in the paranormal started with an impromptu coffee with a colleague, Chris French, who researches reports of paranormal experiences.
He told me stories of countless people who had recounted such events. These experiences tended to start while lying in bed.
Then something unusual would happen – perhaps a demon would appear or the environment would seem strange or there would be a sensed presence.
The person having this experience might also report being glued to their mattress, tarmacked into the bed, totally unable to move.
It's unsurprising that people who experience such things might interpret them as paranormal. But certain phenomena such as sleep paralysis provide an alternative to paranormal explanations for such occurrences.

Hence my interest in the subject, as a sleep researcher.
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