Hulk of a Different Color - S2-E1
Character mistake: When She-Hulk is objecting to the prosecution using live footage of the Rick Jones-Hulk hybrid to prove that Bruce Banner is not the Hulk, the judge overrules her without letting her state the legal grounds to her objection.
Answer: The Hulk is a giant brute who smashes everything in his path when he is angry. In Ang Lee's "Hulk," General Ross, played by Sam Elliot, explains it to his daughter.