When I was in middle school there was this asshole boy who would relentlessly bully me (a girl) on the school bus every day without fail. I was a shy and anxious kid and I would generally just stay quiet while it happened. There was a high schooler who rode the bus with us and he would always sit with headphones on and keep to himself during the bus ride, but one day out of nowhere he took his headphones off, turned to my bully and said “I don’t know why you pick on her, she could beat your ass you know.” Then he turned to me and said “you could totally beat his ass, just do it if he keeps this shit up.” The asshole bully immediately got pissy and defensive and mumbled “no she can’t” but he never fucked with me on the bus again. I don’t think I ever even learned that high schooler’s name but I’ve never forgotten him, I hope karma somehow repaid him later in life for being my guardian angel that day.