WARNING EXTREMELY DANGEROUS
Bruce Banner is a genius scientist who, due to exposure to gamma radiation transforms into the Hulk whenever his heart beats at intensified speeds.
Bruce is a gifted scientist, one of the greatest of his generation. He is the one who tried to recreate the Super Soldier Serum which created Captain America decades before, but however, exposure to high levels of gamma radiation instead of vita-rays, resulted in Banner transforming into a super powerful man-creature known as the Hulk. Previously Bruce would transform into the Hulk, when he would lose control of himself because of rage or adrenaline, stress, which hormonally stimulates the heart rate. The total time of transformation takes only seconds. Banner became the Hulk with increase in heart rate or adrenal levels, suggesting that the true trigger mechanism into the Hulk is far more psychological than physical. When the Hulk transforms back into Banner, the excess muscle mass and energy is lost, presumably to the same place he derives it. Banner was unable to control the transformations, but through training and practice had managed to attain some level of control. Banner's consciousness is buried within the Hulk's, and can influence the Hulk's behaviour only to a very limited extent such as when he changed into the Hulk to fight the Abomination where he managed to possess some human traits when asked by Betty Ross not to kill his enemy. Hulk also prevented an explosion from killing Betty and carried her to safety. After over four years of training to control the Hulk, Banner learned that if he always remains angry in a controlled state then he can easily change into the Hulk at will. This type of transformation allows the Hulk to be much smarter and less enraged than an uncontrolled one. However, if Bruce is sent into a state of stress then he can still lose control and transform against his will despite trying to control it. This Hulk seems to revert back to a savage enraged state where he would attack anyone being friend or foe. Bruce Banner is a gifted scientist: there's no one that knows gamma radiation like he does and, according to Tony Stark |