The class still had some time left, and Kristi wanted to entertain herself a bit more. She looked around a bit, debated growing Daniel some more, but realized that the attention he would bring from suddenly growing anymore would make it less interesting for her, she needed something more entertaining...
She looked in the back, and saw Mark. Mark was a nice guy, but not extremely social. None of his friends were in this class, so he just took a seat in the back, and slept during the hour. Kristi examined him a bit. Mark was 5'9", skinny, long brown hair. He was more of the alternative scene, and was wearing some band T-shirt that Kristi couldn't see, and cargo shorts.
Mark was in the back of the class, so no one was paying attention to him as Kristi slowly began to enlarge him. His head was down on his arms, resting on the desk, and she smiled as she saw his muscles swelling under his head, as his head moves forward slowly, being forced that way by his lengthening torso. She looked at his legs, and saw more and more of his thighs being exposed from his shorts, as his calves and thighs thickened with muscle. His shirt tightened around him, as his back and shoulders swelled larger, and upward, as the arch in his back grew and grew. He was now a foot taller, and still swelling. Veins began to form in the areas of his arms that Kristi could see, as they continued to swell, and widen, as his elbows grew off the desk, and lengthened even farther.
His shorts were tightening around his upper thighs and waist, and Kristi held back a giggle as she saw the thickening bulge in Marks pants. She watched his flaccid penis lengthen, and move down the right pant leg of his shorts like a snake, as his testicles inflated like a big water balloon at it's base.
Still, he grew bigger and bigger. No one noticed because he was in the back, and his stomach began to expose itself, as his once baggy shirt was now extremely tight, and stretch around his body. Kristi still couldn't tell what band was on his shirt, as it was too stretched out now.
Finally, the bell rings, and mark wakes up, as the class begin to leave. He sits up, wipes the drool from his mouth, looked down at his body, and almost shouts. He was now almost 8 feet tall, his muscles weighing him in at almost 400 lbs, his penis threatening to poke out of the pant leg of his shorts, and his testicles threatening to burst his shorts apart. Any flex, any sudden movement, and Mark's clothes would tear apart leaving him nude. He looked up, and saw Kristi smiling.