Mark Collins is the character of 1986 movie, Twisted. He is portrayed by Christian Slater. Despite being talented at school, he appears to be a sociopath who causes more trouble. In fact, he wired his entire house to listen conversations. It appears that he is responsible for the death of the housemaid in the beginning. When Helen comes to babysit him and his younger sister, Susan, Mark started to torment her. In the climax of the movie, he threatens her with a fencing sword. That is until she knocks him onto a spiked German helmet. Mark bleeds to death from this and dies lying at his bed.