Revealing mistake: In the very beginning when we are flying over the dead town in a helicopter, look closely at one of the very first shots of the "empty" city. On one of the left side streets you can see a car driving down the road. It's not a character mistake because she is looking hard out the window and should have spotted the moving car.
Visible crew/equipment: Very close to the beginning of the film, when they first land the helicopter in the abandoned city, there is an alligator on the steps of a bank. A few seconds later when a zombie comes out of the bank and the alligator runs down the steps, you can see a red band covering his mouth (that wasn't there before) to prevent him from biting the actor. (00:04:05 - 00:04:50)DirrtyGrrl
John: You want to put some kind of explanation down here before you leave? Here's one as good as any you're likely to find. We're bein' punished by the Creator. He visited a curse on us. So that man could look at... what Hell was like. Maybe He didn't want to see us blow ourselves up, put a big hole in the sky. Maybe He just wanted to show us He's still the Boss Man. Maybe He figure, we was gettin' too big for our britches, tryin' to figure His shit out.
John: I got an alternative, yeah, yeah, I got an alternative. Let's get in that old whirly-bird, find us an island some place, get juiced up and spend what time we got left soakin' up some sunshine! How's that?
Sarah: You could do that, couldn't you? With all that's going on, you could just do that without a second thought?
John: Right, I could do that even if all this wasn't going on.