A true story

Once in summer, my friends and I decided to do a pyjama party in Maria's house, we started at ten o'clock, approximately, we cooked some pizzas, and we made pop corn, then, we sat on the sofa, and a friend said "we can watch a horror film". But we couldn't decide what film, so we started to watch a random film. First  we watched "saw" which is a horror film about people cutting their own body's parts, after that, we had dinner, and then we watched another film, that was called "insidious". Here starts the worst part.
 My friends and I were watching the film, when suddenly, we saw a strange shadow in on the living room's door, we were so afraid that we started to scream, and we screamed a lot, one second later, the door was opened so fast, Maria's mum appeared behind the door and she said "shut up and stop screaming ladies" and we started to laugh, it wasn't a ghost, it was Maria's mum.