Sammo

Plot hole: In this top level state-of-the-art security prison with transparent walls, cameras everywhere and no civil rights concerns since it's all illegal, there's not a single hidden microphone in the communal parts. Even worse, the wardens never search the inmates, who can smuggle freely all sort of stuff, sometimes in the most blatant way (like when the protagonist gets stitches for his leg).

Sammo ★

Plot hole: In the Bendwater escape, the security cameras show the time outside the prison as 15:59, but a few cuts later, there's a shot of Stallone in his cell with the timecode being 15:56. That's not a continuity mistake, since it turns out that Breslin rolled back the security monitor, the problem is, he is shown doing that at 15:57, and barely rolling the tape past the point when he stands up. By the time the guards are looking at the monitor after 16:01, the tape showing him nice and quiet 3 minutes before would have already rolled to the incriminating part where he breaks out of the cell. (00:06:50 - 00:13:25)

Sammo ★

Plot hole: The most secure prison in the world, designed with the advanced schematics of world leading prison-building architect (J.D Ray Breslin) has cameras somehow interconnected to one another so tightly that physically neutralizing one puts every other camera out of commission as well.

Sammo ★

Stupidity: The security system is able to automatically ascertain the malfunction to the exact valve, and the electrical problem, but the alarm is not triggered at that point, but only when the holding cells are already filled with water and Breslin is making his return. They are on a ship, the fact that it's taking on water feels like a pretty important issue to monitor.

Sammo ★

Audio problem: The helicopter appears in front of the window (like, a few feet away) of the command deck of a ship in the middle of the ocean, with the ship being in full alert and with guards all around the premises but who all somehow missed its deafening arrival. (01:35:50)

Sammo ★

Character mistake: Schwarzenegger welcomes Portos saying "Your name. The fourth Musketeer. It's a good name." Port (h) os was one of the original three musketeers in the eponymous novel. To be "the fourth", his name should have been D'Artagnan. (00:31:55)

Sammo ★

Character mistake: The notice of hold for the check says it's from the Southern Grand Caymen Bank. I wouldn't trust a bank that can't spell the name of the country it is in (Cayman Islands). (00:57:50)

Sammo ★

Continuity mistake: When Abigail is talking to Clark about the bounced check, Fifty Cent in the background has his hand in his pants' pocket between shots. (00:58:00)

Sammo ★

Continuity mistake: When Schwarzy tells the helicopter pilot to "Go down!" to fetch Breslin, the helicopter gun is missing the ammo belt. (01:40:10)

Sammo ★