Why did he say that outloud? I will answer yours if you answer mine.?

Okay so today j had to go to school to turn in a packet for this year. I was standing by a counselor and waiting for my turn to ask her a question and then out of nowhere a guy said " Alexia has a** " and I turned around and the guy and his friends were all staring at me. It felt kinda uncomfortable because the guy who said that bullied me last year. Why did he say that outloud?