In time, Leo stops being flashy; instead of trying to outdo his brother with flips and long leaps and rolls, he matches Raph's speed, sticking to a much simpler (and admittedly more efficient) routine. The simple rush from satisfying the need to run fills his veins with static, a weightless drug - he feels better than he has in days. But he's running on an apple alone, and he knows he has to slow down a bit if he wants to keep it that way.

Soon enough, Leo decides he doesn't need to ask about the interest in Metal Sector at all. He thinks he's feeling the reason, right now.

But it is true: they live in a city at war, hardly the first of its kind, and certainly not the last they'll ever see. When Leo pulls a little ahead of Raph, he abruptly stops on a rooftop, head swerving somewhere to the west. A few hundred yards away he can see a whole block of darkness, a black pit sitting in the brilliance of a thousand lights, and immediately he knows - they both must know - why it's there.

He doesn't bother looking back at his brother, or even motioning a command; he simply changes course, veering towards that dark pit on the horizon.