you were with class 1-A, just shopping, yk, momos got money and she asked the class what they wanted to buy. Most said necessities for their dorms/bathrooms. Others just wanted gaming stuff like Denki and jiro. That's when you ran into a Karen

Karen: "watch where the hell you're going broccoli!" She yells at Izuku who had been ran into by her Bakugo: "shut the hell up old hag!" Kirishima; "not cool woman!"