Other mistake: Towards the end where they steal the chip, they are detected and about a million security guards are all running around, yet 30 seconds later, the only security guard is one man with a shotgun. What happened to their big army of security guards? (01:41:30 - 01:42:55)
Suggested correction: This isn't a mistake. Bishop had been directed to a part of the building where there weren't any security guards; this was shortly before one of the guards found their camera feed. The guy with the shotgun was the only person to head into that location. Unlikely maybe, but possible.
Other mistake: Wouldn't the fish have set off the motion detector?
Suggested correction: Maybe, it depends on the sensor technology. Infrared detectors, no. The fish are about the same temperature as the water. Ultrasonic detectors, no. The sound doesn't penetrate the tank. Radar detectors, no. Radar does not penetrate the water. Laser detectors, no. The beams would reflect primarily off the tank. Image analysis, maybe. The algorithm comparing the image over time might pick up the fish motion, but the discrimination would have been adjusted already to eliminate false alarms.
