Edited for clarity: A few days ago I had the experience of boxing-sparring a guy that doesn't train boxing. From what I could see of him working the bags he had kickboxing training, and my coach (who had talked to him before I arrived to train) said the guy was into that "mixed fighting". So anyway I was very tentative and not knowing what to expect. The round started and I pumped my jab hard whilst circling. I think the guy was overwhelmed/hesitant/slow to start. Anyway he starts leaning forward and trying swinging - so I move back and land 1-2 combos off the top off his head. Round ends. Next round starts in much the same way as the first - I move and pump a stiff jab. MMA guy reaches to clinch and I plant a short left hook on his ear and push myself off him with my right. I notice that he turns his head away as he punches and lets his right hand fall from his guard. So I roll past his right hand and land a hook. Round ends. The dude starts the round with a hook-flurry. I push a lead uppercut through the gap and leave it forward to parry. I feel confident enough to slip his power shots and am now landing every left 3-2 & 1-2 combo I throw. Round ends. With a few rare exceptions I beat him to every punch, and came off better in every exchange. I can't remember how many times I apologized - I'd land a something that I could feel rocked him and I'd say sorry (learned I don't have a killer instinct). I was a weird experience and I learned at lot about myself. Title edited so as to not incite MMA v Boxing war.