Corrected entry: When the shark first smashes the glass with the gurney carrying the man who was first bitten and failed to escape in the helicopter, he releases the gurney about 50 feet away from the glass. How could the gurney maintain its speed underwater? (00:41:00)
Corrected entry: In the scene where Carter and Scoggins swim down into the flooded lab, the shark attacks them and Scoggins is bitten in half. Scoggins has two left feet. (01:02:00)
Corrected entry: When the giant glass window breaks, Samuel L. Jackson and the blonde girl are literally about a second away from being cut down by the water and glass flooding in, but from another angle they are way ahead of the water.
Corrected entry: Toward the end, as people are fleeing the coastline, we see a group of refugees watching a television on a truck alongside the road. They are watching MSNBC. Must have a pretty long cable.
Correction: You can mount one of the newer small satellite dishes on a vehicle if you have a power source and a compass to align it. It's a bit odd to flee a hurricane and take your tv and satellite dish, but it's certainly possible.
Corrected entry: Just before the two sharks simultaneously attack Carter while he is diving through the underwater cage-like corridor with his harpoon we see the rest of the crew monitoring this with the help of tree monitors displaying the pictures of the underwater cameras in the cages (later destroyed by the sharks). The view on the left screen is taken from a camera that keeps moving backwards while Carter swimming towards it. This displayed shot can't be taken by one of the fixed observation cameras.
Correction: The camera isn't moving backwards, the tech is switching the feed from one camera to another farther down.
Correction: The shark "threw" the gurney before letting go, so maybe it had enough force for it to smash like that; it didn't just let go of it.