Factual error: When Denzel Washington wakes up in the hospital he unplugs the cables attached to the heart monitor. By doing this he shuts down the monitor. Actually those monitors go into yellow alert by disconnecting the heartbeat sensors. They can be configured to do nothing at all by disconnecting but they will never shutdown this way.
Factual error: Near the end of the movie, the truck is launched into the Mississippi River, which has essentially zero visibility at the shallowest of depths at all times; thus the nickname "Big Muddy". In the movie, the river is crystal clear, even several feet down.
Factual error: The stolen ambulance had windows on both the driver and passenger sides of the patient compartment. Ambulances don't have windows on the driver's side, and rarely have them on the passenger side, since these walls are used for cabinets.