Confront her

He grabs her by the arm and forcefully pulls her towards him, the coffee cups on her tray spilling on the guests. She gasps in shock as he demands "Do you remember me?!". She gives him a puzzled look, not even recognizing him. Becoming even more enraged, he grabs her face, pulling her closer. "For years you've ridiculed and humiliated men like me. Now it's time to pay the price!"

With his free hand he grabs her top and bra, and with a forceful jerk rips them completely off her body. Her eyes widen in terror as she screams, and out of the corner of his eye he notices the people in the coffee shop all staring at him, unable to even raise their voice in protest.