“Beginning phase four.”
“Well, let's just wait and see how this round goes, eh?” Charlie frowned. Lee sighed in relief, except that it was cut off as he realized he couldn't let Charlie see him do it. Still, frowning was much, much better than snarling.
As Charlie frowned, watching carefully as his body climbed again towards its Herculean peak, Lee did some calculations. He didn't know how much liquid was entering the system each round, but he could do some calculating even without that. For simplicity, he assumed that four units of growth were added each round. Charlie got three of them, and the black tank got one. So at the end of the first round Charlie had gained three and lost one, for a net of two. In the second he gained three but lost two, for an additional one and a total of three. Then, last round, he had gained three but lost it all again. That meant this round he would actually shrink. Lee, meanwhile, was gaining more and more: he was already up six units of growth, and would soon be up ten.
Lee was broken out of his reverie by Charlie snarling “you lied to me.” Lee glanced at The Contraption to see the last of the liquid of this round draining into Charlie's tank, then back at Charlie, who was once more statuesque, his cock still pressing up against his pecs. This time, though, he was not happy. He began advancing slowly on Lee.
“Hang on now” said Lee, backing up, “let's not do anything hasty.” The pump clicked on, sucking size from Charlie to Lee.
Lee snarled “No, I think now is a good time.” With that he lowered his head, spread his arms, and charged. Charlie leapt to the side with muscles he hadn't had minutes before. He felt Charlie's huge hand impact his side, but he spun away from it and all Charlie got was a piece of Lee's shirt before crashing into the wall.
Lee was briefly distracted by the rest of his shirt giving way to his expanding frame, and Charlie used that moment to grapple him to the floor. The two men, one entirely naked, the other naked to the waist, rolled back and forth on the floor, struggling. Lee was doing poorly, getting slammed around, but he learned fast. Soon the fight was much more even, and then it wasn't long before Lee had Charlie pinned under him. His pants and boxers simultaneously gave way to his expanding legs, and it was then that he realized that he hadn't pinned Charlie through skill, but because he was bigger than Charlie.
He was bigger than Charlie. He smiled. “What're you going to do to me now, huh?” he sneered. The pump clicked off.