A fit woman a few rows away.

Sam looked around the bus at the people coming and going. With the phone in hand, he opened the app up. He tried to find some sort of settings button, but there was none. The only interactive part of the app was the button to take a picture. As Sam played with the app, a woman in her workout gear boarded the bus. Paying her fare, she took a seat a few rows away. "Perfect" Sam thought. The phone had turned Dr. Ling into a gigantic mountain of fat without changing her personality much. Looking to the fit woman Sam wondered if the phone only made people fatter.

Taking in a deep breath he readied himself. "Time to test it out." he said to himself before clicking the camera.

The woman's arms were the first thing Sam noticed changing. However to his surprise it wasn't growing fatter, but more muscular! Her biceps grew from their formerly trim size to that of a seasoned body builder in seconds! The next thing he noticed was her chest. Already having large breast, they looked as if they grew right before his eyes. From where he was sitting he was able to see that she now had some well defined pecs supporting that extra large chest. Still holding the phone pointed in her direction, he wondered if it was safe to take another picture. Thinking back to Dr. Ling's transformation, he had to know if she would also get bigger with each picture.