"In the dead of night..."

This was a free write for my english class. She gaves the first sentence and then we had to continue it.
In the dead of night I was hiding under the couch. My older siblings and I had decided to watch a scary movie; unknowest to me, they all planned a very mean trick. I'm not a fan of scary movies so it was easy for them to play this trick.
The movie was about some siblings that stay at home alone. It's almost morning when the youngest finds all the others dead. After the movie, all my siblings ran out of the room; I was starting to get suspicious. Suddenly, noises are sounding all around the house, the same noises that were in the movie. I, not knowing what I was thinking, go look around the house still suspecting my siblings.
In every room one of my siblings is lying in a mutilated way. I'm not really convinced, except maybe the real looking blood, until I come to the last room. There, standing in the middle of the room, was a huge man in a trench coat holding a bloody knife. He comes running towards me. This is why I was hiding under the couch in the dead of night.