Factual error: Towards the end of the film, Spiderman takes his web and uses it to connect to the different power conduits that Electro blew open, ties them together, and power the city back up. Electricity uses several different wires, and crossing them would cause things to blow up or short out. What should have happened when Gwen threw the switch was another power failure, instead of the city's power being restored.
Trivia: Spoiler alert! The way Gwen Stacy dies in the movie is almost exactly the way she does in the comics. The differences are that in the movie, she falls through a clock tower instead of off a bridge, and she hits her head on the ground as it snaps back, instead of just her head snapping back in mid air. She's even wearing the same outfit as she does in the comics.