Brian advanced toward Shira, his above-average tool bobbing slightly. He was so intent upon her, that he did not look where he was stepping. His foot caught on a root, and he lost his balance. His arms windmilled, as he tried to catch his balance. Alas, he could not regain his balance, and fell backwards.
Shira giggled at the sight of Brian lying on his ass, seven-inch cock proudly aloft, with a dazed look on his face. For his part, Brian frowned momentarily, and then began to laugh, as the humor of the situation sunk in. As he did so, he felt something wet on his back. "Oh no!" he gasped, as he spun around. There was the bottle, on its side, the precious brown growth potion leaking out. "Crap!" he swore.
Brian grabbed the bottle, tried to use his other hand to wipe up the liquid that had already spilled. Strangely, it seemed as if the liquid disappeared, almost as soon as he touched it. He looked at his other hand, holding the bottle. He could see the liquid that had spilled over onto the outside of the glass being absorbed by his hand! Brian's mind raced. Then he realized that the back of his shirt was no longer wet.
"What's the matter, Brian?" Shira asked, unaware of what had happened.
Brian was confused. He really didn't know why the potion was behaving so strangely - he just knew that he didn't want to lose the rest of the potion. Bringing it to his lips, he drank the rest.
"Oh hell no!" Shira exclaimed, "Two sips gave you a nice cock - no way am I taking whatever the full bottle gives you!"
"It couldn't have been more than two more sips, Shira," Brian answered, "the rest spilled out."
"Whoa. Sorry about that."
Brian stood up. "It's weird; I absorbed most of what spilled out, right into my skin!"
"That's freeeeaky..." Shira offered, somewhat uncertainly.
Brian leapt up off the ground. "Oh SHIT!" he yelled, as a burning sensation spread throughout his body.
"What's happening?" Shira exclaimed, worry in her voice.
Brian's body began to sweat profusely, and his blood pulsed in his ears. He groaned, as every muscle in his body was consumed in pain. "YEARRGH!"
Shira watched, wide-eyed, as Brian's sweaty body began to pulse and shake. He threw his head back, and bellowed fiercely, as his body began to twist, stretch, and grow. He became taller, his pants rising and pulling out of his boots, his tunic lifted up to reveal his stomach and navel. His muscles bulged, thickened, and grew, becoming round and hard, and very very large. They were so large, that his pants and tunic ripped, revealing the growing body underneath. Combined with his increased height, he was becoming quite impressive. Although he still had fine features and pointed ears, he was bigger than any elf that had ever walked in this world! His cock and balls swelled as well, until a foot-long shlong as thick as a soda can rested upon a set of orange-sized balls. He lifted his arms, and flexed them, roaring thunderously. Shira was shocked - his arms alone had to be thirty inches around.
Brian finished his roar, and lowered his arms. He looked down, through the deep crevice between his mighty pecs, and beheld his huge dick, sticking out proudly. Tentatively, he ran his now much-larger hands across his chest and arms, feeling the size and hardness of his muscles. He ran his hands down amazing abs, to immense, tree-like thighs. He flexed his legs, and enjoyed the feel of the insane cords of muscle that responded to his commands. He brought his hands up, hefted his cock with one hand, and felt his balls with the other. His body was powerful beyond belief now, and that made Brian smile.