Was this the intruder’s goal? An assault on the Wall? Sam disengaged the Tag Along just as the Jiro icon stepped forward, merging with the Wall and vanishing from his perception. Before Sam could enter the alert code, the icon reappeared, tumbling backward through the Wall. The clown-shape flickered, hissing and sputtering as the icon crashed into and skidded along the invisible surface that was the "floor" of the Matrix.