Corrected entry: When Jone's goes into the comedy bar he uses a microphone to amplify his voice, but if the power to the city has been cut off, then how did the microphone work?
Corrected entry: When Hightower approaches the window of the bad guy in the poisonous gas room, there is nothing in front of the window. He then smashes it, lifts up Sgt Lassard to get him through the window, and then you can see Hightower stepping onto something out of shot so that he can get to the window.
Correction: Throughout the series, Jones has always carried his own battery-operated microphone that's connected to a tiny amplifier on his belt, for use in times like this. The designs of these gizmos vary, but it is always the same basic set-up. Even if using the stage mic, they could easily have a generator so business can continue even when the power goes out.
Twotall