Rick was starting to realise that the pink smoke must be what was causing him to change. Somehow, the mixture of chemicals had made him weaker and smaller than his dominant step-son. But when Brandon suddenly stood up, Rick realised that the smoke was having a completely different affect on his step-son. For some reason, the pink smoke had a completely different affect on teenage boys than it did on older men. While Rick had become weaker and inferior, Brandon seemed a lot more dominant and as soon as he stood up Rick cowered in fear.
As well as the power changes the smoke had caused, it soon became obvious that the pink smoke had physical effects as well...
Brandon noticed it as well. Previously, he and Rick had been about the same height, Brandon was 5'11" and Rick was slightly taller at 6 foot, and Rick had always taken advantage of that extra inch to look down on Brandon. Rick had always been kind of flabby and he had got more fat and less fit as he got older, while Brandon was 18 and in the prime of his life, with a slim but toned body from all the working out he did in the gym.
Now...when Brandon stood up, he was at least 3 inches taller than his dad. "What the FUCK?!" Brandon shouted. He was shocked at first, but then an evil smirk came across his face as he realised that this made HIM the bigger man.
Brandon started looking at the rest of his body. He tore off his shirt and pulled down his jeans, leaving him wearing only his boxers, and he was even more shocked at the other changes. While he had been quite muscular but kind of thin before, Brandon was now much bigger. He looked down at his huge shoulders and his now rock hard pecs. He flexed his biceps and saw that what had previously been some quite good muscle, was now two huge bulges of strength. Looking down further he saw that his 6-pack (which had been pretty sexy before) was now even more defined into a perfect 8-pack. His legs were filled with muscle, like a professional football player's or even a bodybuilder's! He now had the perfect body, but the most noticable change was the bulge in his boxers...
Brandon couldn't resist. He tore off his boxers to reveal the biggest change. He'd always been proud of his penis, at an impressive 9 1/2 inches long, but NOW it was huge! His manhood hung down to his knees and was so thick he could only just reach both his hands around it. NOW he was a REAL man...
As Brandon stared down at his godlike body, Rick shivered in fear, then suddenly whimpered "Oh God, I can't believe that all this happened just because of a little bit of gas in the basement!". Brandon heard this and turned his attention to Rick. He was going to find out how strong he was now, and test his strength on his step-dad.