The pain seared through the homeless man. The other man was wrong, it hurt a lot. The pain lasted for what felt like hours, but in the blink of an eye was changed to something more pleasurable. It still hurt, but the stretching felt... exciting.
He couldn't understand why it felt so good, but he closed his eyes and tried to get lost in the feeling, trying to forget the pain and what he was doing; it was crazy. A full minute passed where his body was stiff as a board and yet stretching. He didn't know what to make of the feeling until he heard a tearing sound. And then he felt the shards of his shirt pressed against his abs and chest. Threads tug and hold on for dear life as the fit but small man's growing musculature caused pressure.
He homeless man looked down as much as he could, his neck frozen in place like the rest of him. But he could already see his forearms flaring, and two mountainous pecs rising like dough in the oven. 'Did I die, am I dreaming?' he thought to himself. While there was a hint of fear, he couldn't hide the fact that what he was seeing turned him on immensely.
It was almost hard to hide, as his pants, as if on command, started tearing even more. The master of the controls turned the dial a little more as he noticed his growing beast taking to the experiment well. He smiled, watching the muscles and bulge grow before him. 'Just how far will this man go, submit?'