Continuity mistake: When the Hulk throws the tire during his second transformation, the first shot shows a horizontal trajectory but the second shot shows a 45 degree angle trajectory, which makes the tire land much further than expected.
Escape from Los Santos - S2-E11
Continuity mistake: During his second transformation, David tears his white shirt. When the Hulk is pulling Holly out of the cliff, the white shirt is nowhere to be seen. But when he takes her in his arms, he is wearing the torn white shirt.
Another Path - S2-E7
Continuity mistake: When the old Asian lady is hitting the Hulk using a wooden spoon, he is wearing brown pants. After escaping through the window, the Hulk is seen running on the street wearing blue jeans. But for the rest of his transformation he is wearing brown pants again.
Never Give a Trucker an Even Break - S1-E9
Continuity mistake: There is a scene where the female trucker is driving her truck and she intentionally hits a brown car. The problem is that she had already passed by this brown car a few seconds ago when David was getting into her truck through the window.
Continuity mistake: Before his first transformation, David is wearing a white and blue striped shirt with blue jeans. During his transformation he is wearing a red and blue square motif shirt with brown pants. When fully transformed into the Hulk, he is wearing blue jeans again. But when he's removing the rocks to free the professor seconds later, he is wearing a different kind of brown pants. Finally he's wearing blue jeans again for the rest of this first transformation.
Continuity mistake: After the Hulk breaks the wall to escape at the end of his second transformation, he is wearing black pants instead of his usual beige pants.
Continuity mistake: When David is leaving at the end, he is wearing a blue shirt under his coat. Moments later, he removes his coat but he is wearing a different color shirt with a square motif.
Never Give a Trucker an Even Break - S1-E9
Continuity mistake: When David is in the telephone booth trying to call the police he mentions that he can only read the first few digits of the phone number. Then there is a shot of the center of the dial which is almost all black and we cannot read any digit. A few seconds later another shot shows the center of the dial which is now white and we are able to read the first few digits.
Continuity mistake: When the Hulk throws Mr. Malone in the river during his second transformation, the first shot is too long and we see that he would fall a few feet from the closest river shore. But in the second shot he is flying like crazy and almost lands on the remote river shore.
Of Guilt, Models, and Murder - S1-E5
Continuity mistake: When The Hulk breaks free of the car getting crushed look closely. You can see Lou Ferrigno's palms aren't painted green like they are usually.
Continuity mistake: After David's second transformation, we can see the dynamite sticks on the floor, tied with a piece of black tape at the top and another piece of tape much further at the bottom. When the Hulk takes the tied dynamite sticks in his hands, a third piece of black tape appears close to the existing piece on the top of the sticks.
Continuity mistake: When the lab is set on fire and the Hulk jumps into the room to save Elana, the Hulk that jumps through is actually a stunt double. Noted because the Hulk that jumps in isn't that tall.
Continuity mistake: When Hulk throws a tree root at the helicopter, it smashes off the tail rotor. In the next couple shots, as the helicopter is spiralling down, we see the rotor is intact. (01:25:25)
Brain Child - S3-E3
Continuity mistake: When David leaves at the end he's wearing beige pants, but in the next shot he's wearing dark pants.
Continuity mistake: When Adler moves David into the barrel and loads him into the truck before his first transformation, David's head is at the bottom of the barrel. But when the Hulk emerges from the barrel he is already standing on his feet.
Continuity mistake: When Mike is on his balcony with Linda, we see that he is talking to 12 workers. But, in the next shot, a 13th worker wearing an orange hat and an olive green jacket magically appears almost completely to the right. However, when the 12 workers leave the area, the 13th worker cannot be seen anywhere.
Continuity mistake: During the flashbacks of the abusive father's childhood his own father's shirt sleeves go back and forth from rolled up to just unbuttoned.
Continuity mistake: The Hulk is offered some peanuts by a little girl which he takes with his right hand, yet they're in his left hand in the next shot.
Continuity mistake: When David gets out of his car and looks at the flat tire, the hubcap is gone. When he goes to the front and jacks the car up, he uses the jack handle to remove the hubcap that wasn't there before.
Continuity mistake: While Dr. Morrow is saying, "I did some preliminary tests on David. The limbic system is definitely affected," he is holding a folder containing patient information and a picture. In the next shot the folder contains a different picture with no time to have turned any pages.
Answer: An illness, although it's never stated what kind of illness. David blames his dad for her death because his father never took her to the hospital. So in all likelihood, her illness was never diagnosed anyways and David might not even have known what it was.
Bishop73