Visible crew/equipment: When Garber drops the gun after shooting Ryder a hand quickly comes into frame to catch it.
The Taking of Pelham 123 (2009)
1 visible crew/equipment mistake
Directed by: Tony Scott
Starring: Denzel Washington, John Travolta, Luis Guzmán, Victor Gojcaj
Genres: Thriller
Other mistake: While a sniper is awaiting permission to shoot, a rat crawls up his leg and bites him, resulting in an accidental discharge. A trained shooter, much less SWAT sniper, knows that you never place your finger on the trigger until you are prepared to shoot. Otherwise, you could have an accidental discharge.
Trivia: Denzel Washington wears a yellow shirt and multi-colored tie. In the original film, Walter Matthau wore a multi-colored shirt and yellow tie.
More questions & answers from The Taking of Pelham 123
Answer: The hijackers did notice it. There's a scene where they notice it: look at the girl on the screen and then laugh. They get kicks from toying with people, which is why they didn't smash the laptop and just let the guy keep using it.
You're probably right.