What do you think about this bit of my story?

[Jake (AKA Captain Crash)]

He lifted up the gun to fire, and I made a mad sprint for him. He hesitated in shock, and that split second was all I needed. I lowered my head and slammed into his stomach, and he tumbled down and dropped the gun as we rolled down the slight slope toward the trees. We landed, breathless, at the bottom of the slope. I was up in a flash, and I raised my fists. We circled warily, each of us unsure of what the other was capable of. My tail swished. Suddenly, he threw a right, and I blocked it and got my left into his stomach. He stepped back, so I moved in and threw my right to his jaw. He narrowly missed it, feigned a left to my face and got me in the stomach. I doubled over for a moment and he started to kick. I jumped back and grabbed his flying leg, then gave it a firm shove and a lift. He waved his arms and hopped backwards, trying to stay up, but I overpowered him and sent him sprawling. I made a break for the gun, and he managed to get on my back. I tried to shake him off, but his weight took me down, and he leaned over me, swinging wildly. I managed to block most of the hits, but took some, and I got him in the face a few times. I put my foot up into his chest and shoved, and he fell backwards. I leapt to my feet and went over to him, breathing heavily. He was hurt, I could tell.
"You win," he said. "Help me up."
"You haven't given up that easy," I said. "I can tell. I can sense these things." I smiled proudly. He wiped a bit of blood from his split lip and stared up at me. Suddenly his hand shot up. He did the last thing I expected- he grabbed my tail and yanked. A vicious pain shot up my spine and I let out a horrendous yell. He smiled malevolently as he used it to pull himself up, and I nearly fainted from the pain. My face contorted into a snarl. I was boiling with rage. I lunged at him, punching him mercilessly. He groaned as I slammed my fists into his face and chest.