SS encounter at Burger King tonight. I was behind my dad as we were taking our trays to the table, and a teenage boy came in to look at the menu. Due to the layout of the building, this was a narrow space in front of the counter, with only a railing running parallel to the counter to make it easier to form a line. There's an unspoken "beginning" and "end" to the line; the line starts and ends at the right, and the beginning is closer to the door while the end is closer to the counter. (Hope I described that okay.) We were the only ones there at the time, and this kid came in through the "end" of the line so that my dad, who is a big guy, couldn't easily pass him.
My dad said, "Excuse me," so that he could get by. The kid said, "That's all right," and just pushed past him so that he almost lost his grip on his tray.