Ok, so basically, last Saturday I was sparring with a guy who was significantly taller and haevier than me, but he was new to the club (had done Boxing for three years), so I was matched up with him.
Anyway, the kid threw some hard punches, with one of them splitting my lip. Since he was new, I was going easy up on him up until that point. I got pissed at him, and threw a punchat his ribs that forced him to sit out for the majority of the rest of the lesson. It wasn't even like the kid wasn't used to training, he spent, as aforementioned, three years doing Boxing (although from what I understand, Boxing classes contain less sparring, and more hitting pads. I could be incorrect about this, though).
I didn't feel guilty at all. He was going too hard on me, so I humbled him. However, my question to you guys is do you go rough back to someone if they are pushing you, evne though it is just sparring? Have you ever injured someone while doing so?