Not sure how many people buy into TV/movie tropes, but some that bug me include:
1. Car doors do not deflect bullets. Neither do couches, drywall, or a flimsy wooden table flipped over to "shield" you
2. Car gas tanks (or any gas tanks) do not explode when shot with a bullet
3. The CIA/NSA/FBI/etc. do not have all that directed, real-time satellite coverage and other wizardry to instantly pull up a visual of an area. Like, "Get me a visual of that landing strip in Zaire." It's particularly great when the satellites or public surveillance cameras are able to "follow" a subject's movements, zoom in in real time, and even change angles to another vantage point for the benefit of the viewers
4. On a related note, they also do not have instantaneous access to all information in the universe on their laptops. Like the lead character will say to the technician on their laptop surrounded by monitors and other gadgets, "Pull up the schematics for that 747 aircraft. Who is on that flight? Cross-reference the passenger manifest with known terrorists who were in London yesterday. Now show me if any of those people had a degree in engineering and was small enough to fit in the avionics compartment." One second later, the technician, who is furiously typing on the laptop, as an entire dossier appears on screen, complete with photos of a bad guy in sunglasses and likely carrying a military rifle, will say: "Done. Imran Abudullah Khan, originally from Islamostan. Just arrived from Karachi yesterday. A real bad guy. Part of the Haqballah terrorist network. He definitely could have fit in that space and planted the bomb."