these involuntary transformations lead to many complications in Banner's life. When transformed, the Hulk often acts as a disassociated personality separate from Banner. Over the decades of Hulk stories, the Hulk has been represented with several personalities based on Hulk and Banner's fractured psyche, ranging from mindless savage to brilliant warrior, and Banner has taken control of the Hulk's form on occasion. Banner first transforms into the Hulk after being caught in the blast of the gamma bomb he invented while saving Rick Jones, a youth who had wandered onto the testing range.