01/18/2015 12:17 pm ET Updated Jan 18, 2015

Here's What's Really Happening When You Wake Up And Think You See A Ghost

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It was an ordinary night, but Salma, a 20-year-old student at The American University in Cairo, had a particularly frightening experience. She woke up, unable to move a muscle, and felt as though there were an intruder in her bedroom. She saw what appeared to be a fanged, bloody creature that looked like "something out of a horror movie," standing beside her bed.

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