Continuity mistake: When the Thing is crumpling the flyer between his hands, the flyer alternates between being white and the same orange color as the Thing.
Continuity mistake: When the cage is dropped over the Thing, you can see it is a big solid rock slab on top of wooden bars. When the shot changes, the inside of the cage somehow fills up with bananas, even though there was nowhere for them to drop directly into the cage from.
Continuity mistake: When Hulk says "Thing? Hulk enemy," he raises his right fist while standing face-front towards She-Hulk. When the shot changes, his fist is immediately out of shot and he is now standing shoulder to shoulder with She-Hulk.
Continuity mistake: When the government employee hands Betty the federal document, the federal seal disappears. (00:01:58)
Continuity mistake: The steel beam that Hulk pries off the top of the bridge and throws at Thor wasn't there when he first landed. (00:06:00)
Continuity mistake: The cable Thor tears off from the suspension bridge to wrap around the Hulk changes from a copper color to silver. (00:06:25)
Continuity mistake: After Hulk breaks free of the cable Thor wrapped around him, he lands on the street and is hit by a car, which damages its bumper and windshield. When the shot changes the car is suddenly pristine until Thor lands on its hood. (00:06:35)
Continuity mistake: When Abomination attacks Bruce Banner at the infirmary, he shoots him with a laser blast that leaves a hole in his shirt's chest area. In the next scene after Banner has been taken to Gargoyle's lair, his shirt is no longer damaged. (00:12:45 - 00:13:45)
Continuity mistake: When Gargoyle is standing in the doorway of the hospital room bidding farewell to Banner, they are standing at a straight angle respective to each other. When the shot changes, Banner has moved several feet to the left. (00:20:17)
Continuity mistake: When Gargoyle and Abomination are looting the electronics store and Gargoyle notices Bruce Banner walking by, a display stand appears next to Gargoyle in a close-up shot that is not there in wide shots.
Continuity mistake: When Dr. Blake is walking towards the phone, it is resting on its receiver. When the shot changes to him picking the phone up, it is suddenly on a piece of medical equipment.
Continuity mistake: When Betty is walking through the infirmary, she is walking past a bedridden man to his left. After he reaches out and grabs her by the arm, the shot changes and she is suddenly on his right.
Darkness and Light: Part 1 - S1-E11
Continuity mistake: When Hulk is smashing his fists against the cliff walls, he causes Doc Samson to fall off the cliff and into the river near Hulk's feet. A couple of shots later, Samson has disappeared from view and a boulder is there in his place. (00:02:20)
Darkness and Light: Part 1 - S1-E11
Continuity mistake: Just before Doc Samson tackles Talbot, Talbot fires his blaster, which hits the middle of a console. A couple of shots later, the blast mark is at the top of the console. Its size and shape change as well. In the wide shot it is nowhere to be seen. (00:14:00)
Darkness and Light: Part 1 - S1-E11
Continuity mistake: The nutrient bath container that separated Banner and Hulk was large enough for both to comfortably fit inside, but when Betty is trying to perform CPR on Banner, you can see an unconscious Hulk still in the container, and it is suddenly barely large enough for him alone to fit inside. The design of the container also changes. (00:14:20)
Darkness and Light: Part 1 - S1-E11
Continuity mistake: When the soldiers burst into the lab, Talbot is standing next to the Hulk. When the shot changes, Talbot is suddenly standing in front of his soldiers and ordering them to stand down. (00:14:50)
Darkness and Light: Part 1 - S1-E11
Continuity mistake: When Doc Samson is using the defibrillators on Banner, Banner's pants are suddenly adorned with a belt, which has disappeared when Betty starts cradling Banner's head. (00:15:20)
Darkness and Light: Part 1 - S1-E11
Continuity mistake: When Rick Jones comes to tell Betty that S.H.I.E.L.D. has taken the Hulk, he is standing by the door, and she is standing at the foot of Banner's bed. When the shot changes, they are both suddenly standing in front of a large window. (00:19:05)
Darkness and Light: Part 1 - S1-E11
Continuity mistake: When the S.H.I.E.L.D convoy is taking Hulk away, they are shown driving down a desert road, with large rocks on the shoulder. When the shot changes, the road is suddenly adorned with street lights. (00:19:43)
Darkness and Light: Part 1 - S1-E11
Continuity mistake: When Doc Samson first breaks through the floor of the vehicle that is transporting the Hulk, his arm is emerging next to the platform that Hulk is secured to. When the shot changes, Samson's entire body is coming through the hole, and the base of the platform is nowhere to be seen. (00:19:54)
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.