Macbeth
Act II starts with Banquo and his son Fleance walking in a courtyard in Macbeth's castle. They meet Macbeth, who lies to Banquo and says that he has not thought about the witches' prophecy. When they leave, Macbeth sees a hallucination of a knife. He knows it is not real, but before his sight it changes and becomes covered in blood. He leaves to kill Duncan.