situation: I decided to watch the horror film 'insidious' the other night.  My husband was away for the weekend and I was alone.  I sat with a glass of wine and watched the whole thing.  It was a great story but it did scare me a few times.  After the film, I switched everything off and headed to bed.  It was then that I started hearing noises and seeing shadows and had myself convinced that someone or something was in the house.  Of course it was all my vivid imagination but at the time I frightened the life out of myself.  I ended up sleeping with all the lights on!