Continuity mistake: When the principal stabs the 3rd victim (male) on the gurney, we see that the tongs on the pitchfork extend almost their full length underneath the bed. However as we see up top, the pitchfork couldn't have been that deep given it had the height of the man's chest to go through as well.
The Crazies (2010)
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Directed by: Breck Eisner
Starring: Timothy Olyphant, Radha Mitchell, Danielle Panabaker, Joe Anderson
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Russell Clank: Is he dead?
David Dutton: Well if he is, he won't mind waiting.
Question: Why did the soldiers shoot the non-infected people in the cattle trucks? Is there something going on here that I missed? Does everybody have the virus?
Answer: At this point, the army had decided to simply kill everyone from the town, rather than risk the infection spreading and to save the time and trouble of checking whether people were infected or not.
Also, they probably wanted to contain knowledge of what they'd done. No witnesses.
Answer: Possibly because the Government didn't want word about the virus getting out to the general public so they ordered the solders to shoot the non infected people in order to silence them all, and then created a cover story about a chemical plant exploding in the town.
Trainman