Continuity mistake: When Seal team 5 is sent in to retake the Missouri, Stranex's man sees them trying to sneak in under the ship's radar. As the team readies to drop in on the ship's bow, look through the windshield of the helicopter. No wonder the Missouri picked the helicopter up on radar. They are way up in the air and well within radar range.
Factual error: As Strannix and Krill walk down the "Broadway" passageway, they pass through several watertight doors. These doors never extend all the way to the deck, so anyone passing through one would need to exert some small effort to pick their feet up to step over the threshold. There is no evidence of this, and they continue walking through as if the deck were uninterrupted.
Continuity mistake: Near the end of the movie, when Stranix launches the two tomahawk missiles toward Hawaii, look closely at where the missiles are launching. they're firing out of the space between the two ABLs (Armored Box Launchers) instead of from inside the launchers.
Revealing mistake: At the part where Ryback places a grenade on the door and the man gets blown away by opening it, the shot just before reveals that it's an obvious dummy (best seen in slow-motion).
Visible crew/equipment: After the lady in the cake bit they leave the room and close the door behind them. When the door closes there is a shadow of the cameraman on it.
Continuity mistake: Steven Segal argues with his superior and gets jailed in a meat freezer. When bad guys come to open it and kill him, they throw the door's lock pin at least 7 feet away (you can hear it slide). But Segal overcomes them, shuts them in, and he retrieves the lock pin which is now suddenly directly below the door.
Other mistake: Near the end of the film, when the 2 nuclear missiles are destroyed, one by a fighter plane, the other by Segal, the same shot is used for both the missiles blowing up.
Factual error: When the jet fighter is flying by the naval ship, it gets shot down by a CIWS Phalanx system. The control panel used to fire it is not the real control panel.
Plot hole: There appear to be way more terrorists that take over the ship over the course of the entire film (if including all the different scenes) than what appears to have been able to fit on the helicopter (although Jordan mentioned it was full, the helicopter didn't look that big to hold everyone we see).
Factual error: The space amidships where the bad guys are supposed to be moving all those rails out doesn't really exist. Battleships were designed for compartmentation, with the largest interior spaces being the engine rooms. a space like that could fill with water and could easily cause stability problems. also, there was no provision for the 5 inch armor plate which comprises the deck above "broadway." A large open hole in this armor would have left the ship's machinery vulnerable to large caliber enemy fire.
Revealing mistake: When Seagal kills Tommy Lee Jones, he either sticks the knife into his head or smacks him on the top of his head with his fist (it's not that clear). But what appears to be clear is that this is in fact a dummy head or a stunt double - it looks very unlike Lee Jones.
Other mistake: In each film Segal plays a chief petty officer, who happens to be an ex-Navy SEAL. In the posters for Under Siege, he's shown in the dress white uniform of an admiral. In the second film he's still depicted as an officer, but he has been demoted to a lieutenant. I guess the producers just thought the officer's uniform looks prettier, even though they're the very same uniform, except a chief has anchors on his collar and no shoulder boards.
Continuity mistake: During the final fight scene where Lee dies, Segal pushes his thumb into Lee's eye. If you pause the tape, you can clearly see Segal's thumb is bent inward.
Continuity mistake: When Steven Seagal is swimming alongside the submarine to place the explosive, the bad guys attempt to hook him. In one shot you see that they were successful with the piece of his wet suit caught in the hook and in a different shot you see his wet suit has been ripped above his right shoulder. As Seagal is climbing up to get out of the water, there is no damage to his wet suit.
Continuity mistake: When Tommy Lee Jones is pointing the gun at the guy on the control panel, his glasses are intact. Just as the gun gets closer, the gun is actually touching his eye and the glass is missing.
Factual error: Early in the movie a F/A 18 is shot down by the Phalanx CIWS. At the time this movie was made, "Block A" models (shown in the film) could only engage targets that are head-on or close to it. It cannot track and engage a sideways moving target in the manner than it did.
Factual error: After taking the bridge and continuing down to kill the ranking officer, men are ordered to seal a door with a blow torch used for cutting metal, not welding.
Other mistake: When Seal Team 5 was sent to the Missouri, according to the admiral, they were aboard a CH53E. The helicopter they were shot down in was a CH46.
Continuity mistake: Krill enters the Captain's room to get him to the party. Krill has a cigar in his mouth and when the camera pans to the captain instantly, Krill's voice says "I'm your date tonight captain" within a split second, with not enough time to take the cigar out of his mouth first.
Factual error: The video feed form the cruise missile heading for Hawaii shows constant direction changes. If it was fired from way out at sea, it would just fly the direct route to its target, and it wouldn't have to change course a number of times.
Answer: I was born and raised in Baton Rouge, LA. I heard plenty of Beaudreaux - Thibodeaux jokes growing up. I haven't the faintest idea what the joke was supposed to be. I ended up here trying to find the answer. Under Siege just popped up on NetFlix and I haven't seen it since I was a teenager. I stopped the video to try to look up this random joke. If it's a real Southern joke, maybe it comes from Mississippi or Arkansas.