"Geeze, I am so sorry," Steve interjects, putting himself immediately between them, with his back to Bucky. He throws one hand out behind him, contacting with Bucky's chest to keep him back. "Are you all right, ma'am?" The woman's indignation at being called ma'am seems paramount now over her outrage at being bumped into, and she gives the two of them a look that verges into knowing as she storms off. But she does keep her tablet at her side, he notes with some amusement.