Is this a sin?

The scene opens in a crowded street. It appears to be in a city, probably a business suburb. People bustle past each other in a massive crowd. A lone figure in a black hoodie stands in the centre of the crowd. He stands motionless, and the others pass around him with frustration on their faces. The man appears to be Jack Jones.
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Jack Jones: "Every day people struggle. These people... these people struggle to gain more and more money. Their greed will propel them to their deaths. Others in foreign lands struggle just to survive. Do you see the difference?
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Jack begins to walk through the crowd, pushing those around him out of the way.
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Jack Jones: "Society is so reliant on each other. The second one does something different, society can break down. Someone decides to drive on the wrong side of the road, so many can die."
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Jack then stops and picks up a brick. He tosses it up and down in his hand.
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Jack Jones: "Pointless vandalism. Reminds me of my teen years."
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Jack then throws the brick straight through a glass window, shattering it into thousands of pieces. He walks off talking to himself.
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Jack Jones: "If one person does something out of the ordinary, others suffer. They don't. It's a cruel, cruel world out there. So let me ask you this- If one person decides to break the rules, and someone breaks the rules to stop them from committing this atrocity again... is it truly a crime?"
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The scene suddenly cuts to Jack Jones and a strange man standing on a rooftop.
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Jack Jones: "Lance Ankarres... you attacked my friend Cody. My friend Rufio. You are a threat."
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Lance Ankarres: "Please... Jack, don't do this. This is crazy!"
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Jack Jones: "You hurt my friends Lance. It's over. Judgement must be served."
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Lance Ankarres: "This is a crime Jack! This is a sin!"
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Jack Jones suddenly breaks out into laughter. He smirks a little and moves forward.
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Jack Jones: "I thought I've been through this with everyone. I'm a sinner. But I'm also a saint. I'm a drunk, yet I'm sober. I'm a lover, but a hater as well. All this and more. I'm Jack Jones. I'm apparently, the lost cause. I have a strict set of values and I follow them, god damn it. Now you will pay for what you've done."
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Lance Ankarres: "Stop! Please! What would Cody think! Huh? He would never speak to you again!"
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Jack Jones: "He's not a threat. He's not damaging society. You, on the other hand, are. When one person damages society, that hurts everyone. If one person gets too worked up, too enraged and he attacks someone else... someone's fiance... damage is done. Permanent, irreversible damage."
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Lance Ankarres: "Not this crap again Jack. We've heard enough about your stupid girlfriend!"
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Jack Jones moves forward with unbelievable speed, driving his fist into Lance's face. Lance is knocked back onto the concrete, his head leaning against the edge of the roof. Jack Jones walks over with a quick pace. He grips Lance, and strikes his nose with his palm. The nose instantly breaks, spraying blood all over the concrete. Lance begs for mercy. Jack smiles. With a swift kick, Jack sends the man over the edge of the roof onto the balcony below. Lance instantly crumbles up and begins to scream in agony. Jack leaps off the roof, dropping both of his knees into Lance's chest. Lance calls out in pain, followed by struggling to breathe. Jack slowly stands, and lifts him back up to his face.
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Jack Jones: "I never really liked you anyway."
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Jack quickly lifts Lance up and pulls him upside down behind him. He slams his head down hard with a vicious vertabreaker. He stands back up, wiping the dust off himself. He walks back up to Lance and pulls him to his feet.
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Lance Ankarres: "Stop... pl- please... I'm... so sorry..."
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Jack Jones: "Your only sorry because your in so much pain. You'll have plenty of time to think about what you did in hospital. Hmm, that sounded a tad cliche. Well, if someone asks you what I said just before I knocked you out, tell them I said something cool. Wait, no I got something! This is for my friends..."
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Jack Jones sends Lance Ankarres up in a tigerbomb position, then throws him forward right down into a conveniently placed table. The table buckles under the weight, and leaves Ankarres with several splinters. Jack Jones then walks over to him and throws him with all force into the wall, knocking Lance out cold. He walks off and leaves the balcony.
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The scene suddenly shows the RWU arena, with Jack talking to Cody Ankarres. Cody drifts ahead a bit, and Jack Jones looks at a splinter in his hand. He smiles and walks after Cody, entering the arena.