A FUNNY HALLOWEEN NIGHT?

Thay can still remember perfectly the night of 31st October of 2005. Mark and his friends went to spend the night to a beautiful but mysterious country house. Their plans were to have a Halloween party. Everybody wore scary costumes and they looked very happy in that house full of frightening decorations.It was really a great party, it had been worth spending so much time to prepare everything for that special night.Ten friends were going to meet there for an unforgettable Halloween night. They were dancing and having some drinks in the living room when a girl started to cry and to ask for help, she had seen something that did not seem to her a Halloween decoration. It was a knife full of blood,it was in the kitchen. But nobody cared about her, people laughed at her, they thought she had drunk too much wine.The girl went out of the house as soon as she could in order to get into her car and drive home. However, when she was downstairs, she saw the knife full of blood again,but this time,a mysterious man had the knife in his hand and he was running towards her calling her name with a strange voice: "Susan, Susan!", he said. The girl was so frightened that she ran upstairs again and entered the room asking people for help. Now the rest of her friends could see the man holding the knife, they stopped dancing and looked at him with terror and panic in their eyes. The man went nearer and nearer, he went towards the table where there were a lot of, different drinks. Then he took a glass and filled it with some wine still with the knife in his right hand. People didn't know what to do, they couldn't go out of the room as he was near the door and they didn't have enough courage to try to hit him.They were only some young people trying to have some fun on a Halloween night.At last, Mark jumped towards him, he wanted to take the knife away from him. But when the man saw him jumping towards him, he said: "Hi, Mark, this is a great party, sorry for being late,my car stopped in the road and I have come on foot, I think I've got a caugh,it' s so cold tonight. Well, I was thirsty, I went to the kitchen and I didn't find anything to drink. I saw Jane downstairs, I called her, but she ran and ran,she seemed crazy, what has she been drinking? Then,I followed her and here you were, it's incredible the way you have acted when I have entered the room. Oh! it's a perfect Halloween night". People couldn't believe it, the man was just one of his friends,Martin, he looked so scary dressed in that costume, with that horrible mask and with that knife......They finally greeted him and laughed until Mark said "We are 10 in the group, so if he is Martin, there is someone among us who isn't our friend!!Aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaahhhhhhhhhhhhhhhhhhhhhhhhhhhh!!!!!