
Continuity mistake: In the scene where Alex is watching the TV on how the plane exploded, look at the illustration shown. Then compare it with the illustration that appears on Alex's computer screen. The positions of the explosions shown are different. (00:50:42)
Answer: The scene where Terry was killed was most likely shot during the day. It is quite common for film makers to film a scene during the day to get the right lighting effects and then later CGI the night sky and the proper shadowing. This is most effective when you have an area that would otherwise be too dark or have environment that wont allow for the proper lighting for a night shoot. As for the bus, your guess is as good as mine.