Meet Macbeth

Macbeth is refered by indirect characterization in the first act. He is mentioned to have killed someone by chopping them in half and decapitating them with a sword. It's supposed to give readers (or I suppose watchers/viewers of the play) a feeling of how fearless Macbeth is supposed to be. A bit of foreshadowing that the witches to are when they mention "chesnuts in her lap", which is supposed to reference Lady Macbeth, who will have a larger role later in the story.