But as soon as the fish tank moved from over the green tank, Lee's knees buckled, and he fell to the floor. Shocked at losing a foot of height and half his mass in a split second, he lost his grip on the tank and it fell on its side. Charlie moaned in despair as the magical liquid ran across the lab floor.
Lee, somewhat dazed, stood up. He was now a much more reasonable size, standing 6'6", 350 pounds, with his dick hanging soft at 8". As he stood, Charlie wailed "Oh, now I'll be stuck this size forever" and started a muffled sobbing.
Lee was torn. He did feel bad for Charlie, but he wasn't about to make up Charlie's difference from his own tank - that would leave the two of them about the same size, which would be sort of fair, Lee thought, but not really.
And then Lee realized: he didn't have to give up any of his liquid. The black penalty tank that had been accumulating liquid all along still had some in it. He turned to tell Charlie, and saw that his muffled sobbing had progressed into non-muffled sobbing, as Charlie lay prone on the floor.
He decided to augment Charlie without telling him. So, he somewhat stealthily moved to the black tank and snapped it out of the contraption. He carried it over to Charlie's tank, and slowly began pouring.
The transformation was dramatic. Lee couldn't turn away, not that he wanted to, from the vision of Charlie slowly turning from what looked like Lee had always used to back into his old self. His shoulder rose higher off the ground as his lats widened. His vertebrae became more pronounced as his body had to curl more to stay in the fetal position at his increasing height. His neck lengthened, and thickened.
Finally, the transformation was done, and Charlie was his old self again. Remarkably, though, he hadn't noticed. Lee set the empty tank down and walked over to him. "Hey, what's the matter?"
"What's the matter?! I'm tin-" he followed his own gesture towards his body, intended to make his point, and stopped mid-sentence. "I'm, I'm back!" He hastily stood up and took stock of himself. And indeed he was, almost exactly, back to his old self: 6 feet, 200 pounds, and a cock that was rising quickly to its eight-inch erection. "Oh thank you, thank you thank you thank you" he spouted as he wrapped Lee in a bear hug.
"You're welcome." Lee was impressed at Charlie's sincere gratitude, and impetuously decided to do a little more for him. "Hang on," he said, breaking the hug, "I've got a present for you."
Lee just stared, overcome with emotion, as Lee picked up the black tank, dipped some of the liquid out of his tank, not even hesitating as he lost an inch of height and over thirty pounds. He graciously carried it over to Charlie's tank, and this time he watched himself as he gained that inch of height and pounds of musculature.
"There," said Lee, "we've both come out ahead. I told you we could both win. But," he added, eying their penises, "you'll note that your penis is now nine inches, while mine is about 11 and a third. That's a ratio of just over one and a quarter, or the cube root of three, which means, since we're three-dimensional, my cock is about twice the size of yours, and I'm," he paused dramatically, "twice the man."
Charlie just laughed. "That's not why you're twice the man I am, Lee. That's not why."
And with that, the two naked hunks left the site of the strange experiment, smiling, arms around one another's shoulders.