As you ease your desk-sized chest through the trees, you feel full of excitement. You could do anything, and no-one could ever stop you! Looking around with your enhanced eyes, you see a grey, concrete building on the edge of the park. It has watchtowers and barbed wire fences, probably a important place. You lumber across the park, startling a couple sitting arm in arm by the pond. Sure enough, after you have left the gate, you notice the "Top Secret" and "Trespassers will be shot" on the high, razor-sharp fences. Sneaking in would be stupid, your clothes have burst off and anyway, it's incredibly likely you would be seen, your hulking, lizard-like body isn't really that inconspicuous. With a grin, you flex your arm, gazing happily at the way your biceps, swollen with power, ripple beneath your gleaming reptile scales. A direct approach would be best.
You heave part of fence to the ground with one of your broad, scaly shoulders. It rips like paper and you can see the guards turn to you across the patrol area in front of the vast building. As bullets whistle around, you realize that you can't get close to them without being shot. But then the same impulse that gripped you in the forest takes you again. You blow into your massive palm, clench it tight, and hurl it at a guard. It strikes him clean in the face, forcing it's way past his lips. You hurl another and another, until every soldier is filled with the powerful gas. You look on as every soldier begins to bulk up, their clumsy hands unable to hold a weapon. You notice they are all different creatures. You spot a shark, a rhino, and maybe even a crab. Soon, the area is filled with the sound of animal-like grunts and tearing clothes. You look up and see one soldier on a watchtower becoming a pig-man. His face is already a snout, and his chest is expanding. You also notice his new trotters scrabbling across his rapidly bloating chest, trying to push the pectoral and abdominal muscles back in even as the gas inflated them like balloons. The weight of his heavy bulk becomes to much for the steel tower, and it falls to the ground, hulking pig-soldier with it. You grin, and sprint as fast as your weight allows to the entrance.
Soon, you are deep in the complex. You don't know what you are going to do, but you decide to follow the sign marked "Prototype Hall". As you jog heavily down the corridor, you hear shouts from the way you came in, and the way the ground is shaking suggests some of the less muscled-up soldiers are coming too. A young guard skids down the bend of the corridor, and aims a combat shotgun at you. You slam your bulk against the wall just in time, and see the pellets crack past. If only your hulking body could fit better in this- wait, that's it! Taking a long breath into your expanded belly, you hurl a ball of pure bulk-gas down the corridor. Instantly, the soldier's rump expands to a massive size, his belt buckle pinging down the corridor, maybe even faster than the shotgun's bullets, the seams on his trousers tearing slightly, straining to hold in his rear.. To his credit, he manages a few steps down the corridor, his swollen behind squeaking against the side of the passage, before his chest puffs up with muscle, his legs fattening and tearing the trousers to bits, his biceps inflating, his hands become huge and clumsy. His chest bulks up again, shirt bursting off, firmly wedging him in the corridor. His hulking mass is covered in yellow scales, and his head breaks out those scales too, but not changing. You notice gills on the side of his neck, he must be a fish-type. He yells something at you, and you hear shouts from behind him, the rest of his squad.
Judging by his winces, they appear to be pushing him. A hand holding a pistol forces it's way between one of his bended knees, and fires randomly. You notice a cut on one finger, and you lower your snout down to it and blow. The fingers inflate, becoming clumsy and heavy, scaly like yours, and the index finger's bloating actually rips the metal of the trigger guard, the gun falling to the ground. The two mutated and bulked-up guards have formed a tight seal, and you dash to the end of the corridor and smash open the door. Squeezing your massive chest through the door frame, you see a shape in the center of a large, dimly lit room.
It appears to be...