Continuity mistake: When She-Hulk is suggesting she and Bruce go to Rodeo to go shopping, they leave footprints in the sand. When the camera angle changes to a wide aerial shot, their footprints have disappeared. (00:21:14)
Continuity mistake: When the director spits the contract out, it flies up in the air and then falls back to the ground. When the shot changes and he says "It always goes right to their heads," the contract falls from above and bounces off his head.
Continuity mistake: Just before She-Hulk shoves the contract in the director's mouth, the clip at the top of it changes from black to white. (00:20:57)
Other mistake: After Hulk re-enters the Earth's atmosphere, his pants are still intact. It's one thing for Bruce Banner's pants to stretch enough to remain in place when he turns into the Hulk. It's another for them to somehow not be burned off in re-entry.
Continuity mistake: When She-Hulk is hang-gliding towards the Hollywood sign, you can see the letter Y is unoccupied. When the shot changes, Hulk is suddenly sitting there. The font style of the letter Y also changes. (00:08:47)
Factual error: She-Hulk stops the runaway truck by holding onto the back of it and letting her feet drag on the asphalt. Afterwards, her high heels are still intact. The friction from stopping the truck would have destroyed her shoes within seconds. (00:06:00)
Continuity mistake: When Hulk throws the robot at Dr. Doom, you can only see a green background behind Doom. When Doom gets back up, you can see a rock wall behind him. (00:04:42)
Continuity mistake: When Dr. Doom first walks into the lab, his mouth is open. When the shot changes, his mouth is suddenly closed.
Factual error: Dr. Doom traps Hulk on an asteroid and sends it hurtling towards the sun, which it reaches in a matter of minutes. The sun is around 93 million miles from the Earth. Even if the asteroid was traveling at one million mph, it would still take nearly 4 days to reach the sun, not merely a few minutes. The same mistake applies for Hulk returning to Earth within a few minutes.
Factual error: When She-Hulk spikes the volleyball into the sand, it leaves a hole. Sand is so densely packed that at best, this would have left a small crater. (00:00:25)
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.