Darkness and Light: Part 1 - S1-E11
Continuity mistake: When Doc Samson kicks through the cab wall of the vehicle that is transporting the Hulk, he leaves a hole roughly the size of his leg, and the appearance of the damage suggests he kicked through metal. A couple of shots later, the hole is large enough for a person to fit through, and the appearance of the damage suggests it is now broken glass. (00:19:56)
Darkness and Light: Part 1 - S1-E11
Continuity mistake: When Betty is giving Bruce chest compressions, you can see armed soldiers standing in an empty doorway behind her. When the shot changes, a console explodes, revealing the same doorway that the soldiers are suddenly emerging from.
Darkness and Light: Part 1 - S1-E11
Continuity mistake: When the army helicopters are approaching Hulk in the desert, it changes from twilight to nighttime instantly.
Darkness and Light: Part 3 - S1-E13
Continuity mistake: When Banner re-engages Hulk in the desert after Hulk disposes of Talbot, the face guard for the exoskeleton armor Banner is using is missing, but then reappears when Banner launches the armor's right foot at the Hulk's backside. (00:07:38)
Darkness and Light: Part 3 - S1-E13
Continuity mistake: When Ross is threatening Banner with a gun, there is a shot that shows Banner frozen in place and the camera zooms out to show that the shot was reflected from the pupil of Ross' eye. Since it was a reflection, the flower on Banner's robe should have been on the viewer's left since the actual Banner has the flower on the viewer's right. (00:13:32)
Darkness and Light: Part 3 - S1-E13
Continuity mistake: When Ross is getting ready to sabotage the experiment, the equipment on the wall next to the fire extinguisher changes appearance. A white label also appears on the front of the extinguisher. (00:19:07)
Darkness and Light: Part 3 - S1-E13
Continuity mistake: When Doc Samson tackles the new Rick Jones-Hulk hybrid and knocks over the cylinder for the nutrient bath, Banner spills out, and you can see he is wearing shoes. A few moments later when Banner begins to run outside, he is suddenly barefoot. (00:19:44 - 00:20:10)
Hulk of a Different Color - S2-E1
Continuity mistake: When General Ross is first seen in the hospital bed, his mustache is a darker shade of gray than usual. (00:06:45)
Hulk of a Different Color - S2-E1
Continuity mistake: When She-Hulk is holding the stenographer up in the air by her chair, she is holding the chair by its right-rear leg, while standing in front of the third juror from the left. When the shot changes to She-Hulk putting the stenographer down, she is suddenly holding the chair by its left-rear leg, and is now standing in front of the juror on the far right. (00:08:05)
Hulk of a Different Color - S2-E1
Continuity mistake: When the gray Hulk picks Gargoyle up from out of his cockpit seat, he picks him up with his left hand, with his upper knuckles towards Gargoyle's body. When the shot changes to Gargoyle saying "Release me," Hulk is holding him with his right hand, and his thumb and fingers are pressed against Gargoyle's body. (00:12:28)
Hulk of a Different Color - S2-E1
Continuity mistake: When the gray Hulk is telling She-Hulk that he's taking over Banner, he's pointing his left-hand index finger in her face. When the shot changes, his left arm is suddenly down at his side and she has moved back a couple feet. (00:13:55)
Hulk of a Different Color - S2-E1
Continuity mistake: When the gray Hulk finds the Rick Jones-Hulk hybrid wandering the desert, the latter does not have any earrings. After Rick Jones is restored to normal later in the episode, he suddenly has an earring in his right ear.
Hulk of a Different Color - S2-E1
Continuity mistake: When the Leader has siphoned the gamma mutation from out of the Rick Jones-Hulk hybrid, he reverts back to his human Rick Jones form. A few moments later, we see in a wide shot that Rick's skin is green again.
Continuity mistake: When She-Hulk is reading the invitation to her high school reunion, she is holding the letter with both hands. When Bruce Banner walks into the lobby and asks her if his package has come in, she is suddenly holding the package he is asking about and is no longer holding the invitation. (00:00:25)
Continuity mistake: When She-Hulk first takes the invitation to her school reunion out of its envelope, the invitation is folded in half. When Gargoyle finds the invitation a few scenes letter, the crease is no longer there. (00:00:27 - 00:06:00)
Continuity mistake: When Hulk reverts back to Bruce Banner in the treehouse, Banner's hair is longer than it was at the beginning of the episode. (00:00:33 - 00:09:40)
Continuity mistake: When Bruce Banner is attacked by Abomination, he is wearing gym shorts that go roughly midway down his thighs. After he has transformed into the Hulk, the now tattered shorts go all the way down to his knees. Hulk is much larger than Banner, so if anything the shorts should look more like a tattered speedo on the Hulk. (00:00:34 - 00:05:38)
Continuity mistake: When Gargoyle is driving She-Hulk's car, one shot shows the top of his head to barely be taller than the steering wheel. When the shot changes, his head is as suddenly high as the rear view mirror. (00:03:21)
Continuity mistake: When She-Hulk drops Gargoyle to the ground, he ends up next to her right leg, with his head near her knee. When the shot changes to Gargoyle getting back on his feet, her leg is nowhere to be seen. (00:03:50)
Continuity mistake: When She-Hulk slams the trash can over Gargoyle, he is by the driver-side door near the hood of the car, and the can is taller than the door. When the shot changes, he is suddenly by the opposite end of the door, near the rear wheel, and the can is drastically shorter. When She-Hulk drives away, he is suddenly further away from the car. (00:04:13)
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.