It was a PE lesson during which your class were playing volleyball. Dylan was on the other team and they were winning

,,Ouch! You broke my nail!" You shouted as you hit the ball that Dylan had served earlier. You weren't focused for a moment, which is why you hit it the wrong way

,,If your team loses, your nail won't be the only thing I break today!"

He replied with smirk and winked at you. He knows that his jokes annoy you more when others see and hear you both