Character mistake: The bad guys at the beginning of the movie launch a drone that scans for target. The woman's data appears in the HUD and it says "Stacey Canon - Interpol REGISRTY" (00:02:20)
Character mistake: The officer at the control room screen mapping the advance of the invading force tells Gibbons that they've covered all the halls, but looking at the map it's simply not true; if the man is a highly qualified professional, he is doing a terrible job, because he provides no help and paints the situation under the wrong light not telling the responders where the bad guys are coming from and all the areas (about 2/3 at that point) that are still secure. (00:02:40)
Character mistake: When the drone looks Gibbons in the eye, the 'elevation' data keeps fluctuating wildly between 33 and 39 meters, which is obviously wrong. Besides, they are underground. (00:03:10)
Character mistake: When the unlikely trio of heroes gets off the helicopter and calmly boards the GTO, Samuel Jackson fails to properly close the car trunk, that stays semi-open. (00:13:55)
Character mistake: Darius in his waiter suit arrives at the party and goes past two officers with flags. At the back of the room there are sequined versions of the flags hanging as banners; the US flag is displayed 'backwards', as the union section should be in the top left. With an official event with generals and top level official government brass present, that's a flagrant breach of etiquette. (00:37:20)
Character mistake: At the party, George Deckert tries to sway his old army buddy and convince him to join the coup. He says "With or without you. Three days." Within minutes he gets killed. Day after, Stone goes to the air carrier. Then the day after is the State of the Union day, when the coup takes place. Not 'three days' then, but two. (00:38:50 - 00:58:20)
Character mistake: John Gleeson Connolly appears in the final credits as Lt. Alabama 'Bama' Cobb, but during the movie he's always called "Sergeant." When it's XXX to call him like that, adding that he was too dumb to make Captain, it's logical, as he'd basically address him as the rank they had when they served together and belittles him for not jumping in ranks all that much, but even the General addresses him as such in the Capitol Hill shootout. (01:18:30)
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