Also known as Siris, this creative killer has a habit of tying people to two bent pine trees, and then letting the trees whip into the air, thereby ripping the people apart. (Wow, Hannibal Lecter would be proud.) Sinis meets his match when Theseus comes along, though. The hero gives the villain a taste of his own medicine and (via pine tree) sends Sinis's body parts whizzing into the air. Then, Theseus bonks Sinis's daughter, Peregune, and has a baby with her. (Jeepers, why is Greek mythology so messed up?)