So I just saw a clip from the new disaster movie 2012.
There's a certain give and take that an author and his audience have. The name for it is Suspension of Disbelief. We can watch Roxanne and set aside whether it's plausible or not that someone with a disfiguring birth defect on his face could not get it repaired because of an allergy to anesthetics. Some folks can even watch Star Trek movies without theorizing about how the warp engines work.
But I'm sorry: if you're in a small twin-engine aircraft over the city of Los Angeles while it's undergoing a catastrophic apocalypse, wouldn't the first thing that comes to mind be to perhaps attempt to gain some altitude so that you don't have to navigate between the buildings that are toppling over?