Jeff saw a muscle button and looking at his somewhat flabby belly and decided to go for a healthier transformation then just shrinking his dick. He hit the button and felt a tingling as his muscles started to grow. After a second he checked his body and while not hulking he had a pretty healthy amount of muscle on his body and his abs started to look a little more defined. Jeff decided to go further, he could always just revert the amount of muscle if it got outrageous. Holding down the button Jeff looked as his abs became a six pack and his biceps got more defined. A second latter his shirt grew really tight around his muscles as an 8 pack developed. One more second and his shirt ripped off and his loose shorts were getting rather tight. Jeff looked in a mirror and laughed with a slightly deeper voice as he gazed at the herculean figure that he was. The only real problem was that his grip strength had also increased to an absurd degree and while seeing his muscles grow further suddenly heard a crack.
Jeff thought "Wait was that..." then quickly glanced to the chronivac device in his hand, and noticed that the plastic device had a very significant crack and was now making odd noises. Jeff put it down and thought "Alright... how bad did I make things?" Then the Chronivac sputtered and...