Banquo's Warning Goes Unheeded
The witches give Banquo riddling prophecies too - he'll be "lesser than Macbeth, and greater" and will father kings but never be one himself. This creates immediate tension between the two friends, planting seeds of future conflict.
When the witches vanish, Banquo stays rational, comparing them to "bubbles" and wondering if they've eaten something that made them hallucinate. Meanwhile, Macbeth is desperate for them to return - he's already hooked.
Ross and Angus arrive with news that Macbeth has indeed been made Thane of Cawdor, confirming the witches' second prophecy. This moment is crucial because it makes Macbeth believe completely in their supernatural power.
The confirmation of one prophecy immediately makes Macbeth focus on the biggest prize - the crown. You can see his ambition taking control as he starts planning his path to power.
Critical moment: This is when Macbeth transforms from curious bystander to active participant in his own downfall.