 CONT: Time of day during the final battle sequence. The first pan  over the bridge from southeast looking north, is clearly midday as  the shadow of the bridge is almost directly underneath it. When  Magneto first walks onto the Golden Gate bridge it is close to  sunset, and the shadowing is very inconsistent, sometimes sharp from  direct sunlight, sometimes not. By the time they move the bridge and  drops it onto the island, and lowers himself to the bridge, and all  the mutants move forward, it is suddenly dark. In the DVD  commentary, everyone acknowledges it, but says "Hopefully youre  into the movie enough . . ." The whole battle is then shown as  taking place in the dark.