The Hulk is a fictional character, a superhero appearing in comic books published by Marvel Comics. The Hulk is cast as the emotional and impulsive alter ego of the withdrawn and reserved physicist Dr. Bruce Banner. The Hulk appears shortly after Banner is accidentally exposed to the blast of a test detonation of a gamma bomb he invented. Subsequently, Banner will involuntarily transform into the Hulk, depicted as a giant, raging, humanoid monster, leading to extreme complications in Banner's life. Lee said the Hulk's creation was inspired by a combination of Dr. Jekyll and Mr. Hyde and Frankenstein.