Factual error: The opening shot of this episode incorrectly depicts the Lincoln Memorial Reflecting Pool to be located between the Washington Monument and the U.S. Capitol building. In reality, the reflecting pool is located between the Lincoln Memorial and the World War II Memorial, with the Washington Monument roughly 1/5 of a mile east of the World War II Memorial, and the U.S. Capitol nearly a mile and a half east of the Washington Monument.
Factual error: When Hulk throws the Humvee at the helicopter, the pilot bails just before it explodes and manages to deploy his parachute. The helicopter was hovering roughly 30 feet above some buildings. That's not nearly enough distance for the pilot to have deployed his parachute before he fell onto the roof of one of the buildings.
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.