John Lee was obese his entire life. As he grew older, his weight increased and he began to experience health problems related to it, such as diabetes, apnea, and high blood pressure, as well as limiting his mobility. Desperate, he volunteered for an experimental procedure that would destabilize his fat cells, making it more easy for them to be flushed from the body. However, what happened was that his skin, muscles, and most of his bones (except for his skull) were also affected, turning everything into a jelly-like mass. At first, he was horrified, but soon realized the benefits of his new form, including solving his health problems, and decided to use his abilities to have "fun " as a super-criminal.