Corrected entry: When Ellen and Thea are building a sand castle, Ellen is standing looking out at the ocean. Then it shows a close-up of Thea asking her what's wrong and there is a can of soda front of them. When it cuts to Ellen coming back to Thea the can is gone. (00:27:20)
Corrected entry: Right at the end of the movie when the shark has been killed, Ellen Brodie screams 'Michael', meaning her son, to which Michael Caine replies 'I'm over here'.
Correction: He actually says "Come over here", referring to some debris he's clinging to.
Corrected entry: Ellen Brody had flashbacks from scenes in the original Jaws movie where she wasn't present. Also she has a clear memory of the attack on Sean in the beginning of Jaws 4, even though she wasn't present there as well.
Correction: What we see is how Ellen pictures how things went, they are not meant as flashbacks of things she has seen. Plus right after Brody and his son Sean are done mimicking each other, the camera cuts to Ellen standing there with a cup of coffee in her right hand watching the whole thing right before the doorbell rings and Matt Hooper arrives.
Correction: You are very much mistaken. These moments look a lot like because they are archive footages from the first movie. The moment of shark attacking Sean looks like a flashback too. These scenes are much too confusing. There is no way that she would imagine them like this because she wasn't present there.
Corrected entry: Hoagie, Michael and Jake are aware that the shark is present. Yet Hoagie lands the plane in the sea and Michael and Jake get out and swim to the boat.
Correction: You've never landed a plane next to a boat in the sea, which they actually did a sea landing and the pilot did a good job to, doing that next to the boat was to dangerous and you would need an exceptionally good pilot. Hoagie also says that the plane would attract the shark giving them plenty of time to make the short swim. Everything in that scene story wise was a huge gamble.
Correction: There was another way to save Ellen. They could have landed closer to the boat. Then they could climb on the plane, walk on its wing and jump onto the boat. Swimming to the boat was way too risky.
Correction: How else were they going to save Ellen?
Corrected entry: When the shark comes near Michael's scientist friend under water, it doesn't attack him. A few shots later, the shark is biting the wood. It shows blood in the water. Where did the blood come from? No one got killed.
Correction: The blood comes from the shark. I can't see a shark chewing and breaking wood and not getting cuts and huge splinters, etc.
There is no evidence that shark's mouth was injured when it was biting the wood. Its mouth has no wounds in later scenes.
Correction: The can of soda is not gone. I watched that part 2 times just to be sure.