You decide to head deeper into the forest. Lumbering slowly across the thankfully deserted park, you enter the trees. You still feel a bit gassy, but when you try to expel the air a thick, chunky tail pops out of your bloated rump. Waving it interestedly, you suddenly hear rustling sounds, and three men in camo suits emerge from the trees, carrying rifles. They look up, and see your hulking body. With a cry one aims his rifle at you and fires, the bullet glances off your armour of scales. But it does sting.
Acting out of anger, you grab the man who fired and yank him up with a bestial roar. The other men halt, realizing they can't shoot you without harming their fellow. drawing the man closer, you open your mouth, revealing sharp yellow fangs, and clamp your jaws round his mouth. You feel him struggle, but you do not let go. Drawing a long breath into your mighty lungs, you blow into his throat as hard as you can. Your breath travels down his throat and all the way into his feet, inflating them into hairy three-toed paws. The man tries to push you away even more frantically, but you blow again, and his green trousers pop open to reveal furry legs with thick muscle. You blow again, and his hands pop into clumsy claws, again and his sleeves tear open allowing his chunky, hairy arms to burst free. You hear him still pushing weakly, and again you blow, his pectorals expanding with gassy noises, abs popping out too, again and his back hunches over, again and his chest bloats out against his shirt, again and the buttons ping off like bullets, revealing the huge bulk of his fur-covered chest, and a another deep breath and his head snaps out with a wolf-like muzzle.
But you keep puffing, harder and harder, inflating him with muscle like a balloon, again and again until the force of his rapidly bloating chest pushes him away. He falls to the ground, actually shaking it, wolfish tail popping out with a farting sound. He tries to stand, but he is too bloated with muscle, head tiny compared to his hairy chest.
Turning to the next man, you notice that he is carrying a gas canister. This gives you a idea. You grab it from his unresisting hands and open it with your sharp teeth and breath your newfound power into the gas. Turning to him with a evil leer, you attach the hose to it, and jam the tube into his mouth, and sit on a log to watch.
Slowly, the man's head puffs up, and then snaps into a scaly snout like your one. He raises his hands in terror as the modified gas inflates them. The fingers break out in scales, and then expand until they are big as salamis, pressing against each other so that they cannot move. His palms become like dinner plates, veins sticking out like cables, and his arms expand, seams popping on his sleeve to reveal the tidal wave of lizard flesh. His feet expand, bursting the shoes, becoming even larger than yours, with stubby toes. His legs inflate too, become like tree trunks, the shorts tearing slowly at the bottom, and then finally burst as his rump fattens up, a massive tail bursting out of his rear. Finally, his chest slowly bloats into a perfect sphere, the seams at the side of his t-shirt ripping under the incredible pressure that only expanding flesh can exert, before it falls into two halves to the leaves below. The gas cannister falls to the floor, exhausted. The transformed human burps up some gas before his head slumps onto the fat of his chest, only to snap up again as you pull your hulking body up from your now slightly crushed log. "No..oh god, no please!" he hisses from his new snout as you slowly advance towards him. You hiss at him dismissively, and look around for the third hunter. He must have run.
Leaving the overmuscled hunter writhing on the ground and the bloated one whimpering pathetically, you force your bulk between the trees in search of food or shelter.