Stupidity: The highly trained commandos who knew everything about the NSA base and penetrated it during a perfectly planned operation through weapons and devices that pierce steel like butter, decided to stand outside the barn (so they knew something valuable was there) and its wooden door. It even has a direct line to the command center.
Stupidity: The bad guy's henchman has a plan to stop XXX from reaching the wagon with the President. He hides in the kitchen compartment, which is in a separate area that XXX has to decide to look up and get inside of for no reason (guess that looking at Ice Cube he guessed he'd be going for a snack at some point), leaves his automatic weapon on the floor and just waits there in a ceiling compartment with a knife. If he just shot him through the wall or the door, I guess it would have been too easy. (01:26:20)
Stupidity: Agent Toby Lee Shavers guides XXX through the wrecked military complex constantly telling information that Ice Cube should already know perfectly as essential basic mission objective data, such as the location of Gibbons' office and which hard drive to grab out of 3. Would be fine if Darius told him to shut up, but he does not, apparently he needs the infodump. (00:21:20)
Answer: To break the surface of the water making an easier penetration. Hitting water at high speeds can be like hitting concrete. By stirring up the water it "softens" the impact.
EMTurbo