My sister went on a winter trip with some friends of hers last year and had a really fabulous time. However, there was a very bad surprise for her during the second night of her trip. She shared a room with her friend in a really cozy, traditional hostel on a mountain. As they were deep asleep, my sister suddenly felt 2 hands grabbing her all over her body. She could not see anyhting because the room was totaly dark. She was trying to resist that thing- whatever on earth it was- but that was impossible, it was trying to choke her. All that she could feel was physical pain and fear! She started screaming and her friend who was sleeping at the bad beside hers woke up and tried to calm her down. My sister got so frightened that she could not sleep at all after this incident. Since then, she always prays before going to bed and she sleeps with a picture of Maria and Jesus next to her head, because she suspects there might had been a demon stalking her that night and she doesn't want to experience something familiar ever again!
I asked my sister "are you sure it was not a dream?" and she insists that this scary experience felt too real, she could actually feel these hands that were choking her and that's so creepy. I know there are realistic dreams and I have to tell you that, no matter how charmed am I by the spiritual stuff, I'm a sceptic and I always try to find a rational explanation for the strange happenings- and usually there is such an explanation- before I turn my thoughts to ghost activity.
In this case, although I'm not convinced that it wasn't just a bad dream, I have to tell you my opinion: I'm a Greek- Orthodox and in my country there is a traditional belief claiming that during the 12 days between Christmas and the 6th of January (which in our religion is the day that Jesus got baptized and blessed the water, making the bad spirits go away) there is a sort of demon- like spirits who emerge on the surface of the earth (they live underground the whole year) and their activity is to stalk people for 12 days, starting from Christmas until January 6th. Usually, they are not mischievous, they rather look for a funny way to play (like stealing food and eating the Christmas candy) but they can be bad. When the water is blessed by a ritual on January 6th, they are supposed to go away and return next year.
The reason why I mention this infomation is because my sister's experience took place on December 30... I'm not claiming this is the only explanation, I just think it's interesting. Thank you for reading.