It is felt alone off stage and is an indicator of the physical decline of the Macbeth family, as Lady Macbeth Snow is no longer in control. Shakespeare reveals how ordinary people react when they discover the enormity of the crimes committed by the Macbeths. Furthermore, Shakespeare brilliantly describes the psychological “truth” of mental breakdown: the mental torture, the guilt, and the obsession with the past. Shakespeare describes Lady Macbeth's condition as very painful, but also clearly as the result of her choices. During the sleepwalking scene, Lady Macbeth reveals every aspect of the regicide and indirectly confesses to the murder, in the presence of the priest and lady-in-waiting. They both hear her reveal her guilt and observe her futile attempts to remove the blood from her hands. She exclaims: “out of damn place!” this shows how he is unable to shift his emotional guilt and remorse after numerous attempts to forget the act. This is said in contrast to his earlier statement about how a little water will relieve them of their guilt. The physical symptoms of washing one's hands also remind us of Macbeth's insight after actually committing the murder: “Will all great Neptune's oceans be this blood/Cleansed from my hands? NO". The theme of dramatic irony is made evident here and is used to reveal Lady Macbeth's guilt. Shakespeare has Lady Macbeth say “what's done is done”, thus suggesting that it would no longer be a cause for concern Here, for all her courage, ambition and determination, all that has been "done" is not past, but present - and ever present - in her mind. She herself refers to her first words when she says: "What it's done it can't be".