How is that possible?

The girl stands icy over her opponent, who is pathetically trying to protect himself. She raises her leg high up, threatening the man with a hammer kick. "No...", he pleads, startling in fear, but it's too late, and a tremendous stomp is delivered over his body. The blow forces all the air out of his lungs, leaving him paralyzed. Grace doesn't allow the man to recover, and going on her knees, traps his head between her bare tights; she has put him in a deadly headlock, chocking out the little oxygen that he has left. The intruder is now helpless. The girl grasps his face, calmly, grabbing the balaclava to uncover his identity. "No, dear, don't do that to me...", the man prays, "I will leave, I will leave immediately…please...don't ruin my life". The topless fighter isn't moved though and insensitevely unwraps the piece of cloth, showing his face. Behind the camouflage there is a sweaty 50 years old man, shocked and worn out. "You are one of those thieves that my mother apprehended the last week…", she states, observing him carefully, "Do you know what would happen if she knew what you did tonight?". "Oh please…", the man begs almost in tears, "Let me go and I swear, I swear that you won't see me again…do not tell her, please little girl", "I'm not a little girl, I'm her daughter son of a bitch", she replies, tightening the hold on him.