I was boxing a friend in mine in his backyard (he was taller and with a more wiry physique, I was shorter but thicker and more muscular), and since he was quite a bit taller I mostly focused on working his body. I hit him with hard hooks and I felt his abs get softer, his breathing heavier and got more lethargic as the fight went on. Finally, in the 5th round, I hit him with a right hook using all my weight and power, twisting my body and I felt my fist practically impale his solar plexus. He started gasping, loudly, and went down. He couldn't breathe and the gasping got louder as I counted him, and while he did try to get back up (probably fueled by flexing over him and taunting him,) he couldn't beat the ten count. He later told me he thought he was going to asphyxiate because I hit him so hard and perfectly that he literally could not take a breath in.