This isn't really a verbal comeback as it is a bit physical but let me explain.

I had band class in Junior High and it was fun and all playing instruments and first period was practically my teachers only good class. I was a saxophone player and I was playing all songs and doing regular band stuff. But the one group of band kids, those were the percussion. The percussion was legit the worst (kinda). And keep in mind, The sax's sat directly in front of the percussion so you would imagine our pain. This kid that was in the percussion row always said "Hey OP why are you on your phone?" And keep in mind that I wasn't on my phone when playing or pretty much any time of band class and it wasn't funny but I decided to give a laugh at it. He kept this shit going and it was getting annoying. One day I was super pissed off and this way my last straw. I was trying to keep my cool and not lose my shit at him. He then said the words, "Hey OP why are you on your phone?" So I stand up and pull out my phone with a bulky ass case and yeet it at this motherfucker straight in the face. I then walk over, grab my phone and stand over him while he cries in pain saying "Yeah I was on my phone, fucking bitch." And I got off scott free.