They kept him chained up, he was dangerous. He stood at 8 feet tall with pitch black fur and a toxic, green tongue. They kept him in a room on his own, for he attacked anything that dared to move. They tried to kill him, but he didn't die. He was the monster they made him to be, and they hated it. They regretted playing god and trying to create the 'perfect' predator, but they succeeded, for this beast was perfect for hunting humans, and humans alone.
He quietly waited for his chance to escape, he was smart, but he played dumb for the scientists that studied him. He knew humans used to be the perfect predators of earth... that is, until they destroyed it with their insatiable hunger for material things. He knew that he was now at the top of the food chain, and if he escaped, whatever is left of the human population, was in danger of transforming from the hunter, into the prey.
He paced the room impatiently as far as his chains would let him, he knew that the maintenance team were coming to clean and repair his area today, and they always left confinement doors open. He hoped that they would leave his door open, giving him a chance to escape, and to head to the recovering ruins of earth. No human ever went there, knowing how dangerous it was now, but he didn't care, he would be willing to kill anything that stopped him from the leaving the confinement of the scientific space craft.
The time had come when the maintenance team arrived, he had his escape planned out, and his weapons ready. The maintenance team came to his door and opened it, they then inspected the room and went to their tools and cleaning supplies in the hall to grab what they needed. He seized the opportunity to spit acid onto his chains, melting them, and allowing him to escape the room silently. He managed to slip through the halls of the ship, and make it to a smaller ship.
A siren went off, indicating that someone noticed his escape. Someone walked into the room where the ship was kept, and they saw him. "Don't you dare move!" They yelled at him. He growled at them and walked up to them slowly, hissing and snapping his jaws at them. He kneeled down so his face was level with theirs, he then pushed them to the ground and pinned them there.
They began screaming, but no one else came. They struggled against his giant paw on their chest, he had finally had enough of hearing their screams. He clamped his jaws on their arm and teared it off slowly, making bright red blood pour out and onto the floor. He dropped the arm and moved so his jaws hovered above their head, drops of acid escaped his jaws and landed on them, making them scream in agony.After a few minutes, the horrific screams stopped. He stood up and lifted his head triumphantly, he then got into the small ship, and headed for what was left of earth.