Factual error: When Hulk throws Abomination over the post office, the United States flag has only ten stripes, five red and five white. The U.S. flag has 13 stripes, seven red and six white. (00:04:50)
Factual error: She-Hulk's license plate reads "GAMMA-GRL." She's from Washington DC and now resides in New Mexico. Both places have a limit of seven characters on a license plate. It can't be a vanity plate either, because both places also require front and rear plates.
Factual error: When the Dark Hulk is attacking the city and destroys a helicopter, the occupants can be seen with their parachutes already deployed immediately after the helicopter has exploded. Not only would they not have had enough time to already be parachuting to safety, but given that the helicopter was only a few stories high in the air, they wouldn't have had time to safely deploy their parachutes in the first place.
Factual error: When She-Hulk loses her grip on the elevator cable, she catches onto the structure on the walls, but Betty loses her grip and falls several floors before She-Hulk can fall after her. A couple of shots later, She-Hulk has already caught up with Betty, even though there wouldn't be enough distance for She-Hulk to have reached terminal velocity to catch up with Betty.
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)
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)
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 Bruce is tying the rope through the handles of the magnetic devices to prevent falling onto the laser beams, he only loops the rope through the one on the left, he doesn't tie a knot. The moment he started hanging onto the rope, his weight should have pulled it through the handle.