An Angry Man
Hulk is the alter-ego of the famous Dr. Bruce Banner, one of the most famous superheroes of the Marvel universe, even before the movies that started to highlight lesser known characters. Bruce Banner was trying to replicate the serum that turned Steve Rogers into Captain America, but there was an accident and it was then that he first transformed into the Hulk to protect himself from Gamma radiation. The Hulk is a very large, very strong and almost immortal green version of himself. From then on, whenever he was angry, he transformed into this awesome and uncontrollable character.