What is an example of sarcasm in act 1 scene 1?

In Act 1, Scene 1 of Shakespeare's "Romeo and Juliet," when the character Sampson boasts about biting his thumb at the Montagues, he is sarcastically provoking them while pretending to be nonchalant. His statement, "I do bite my thumb, sir," carries a tone of mock innocence, as he knows it is an offensive gesture. This playful yet biting remark encapsulates the underlying tension between the feuding families, showcasing Sampson's use of sarcasm to escalate the conflict.