More than anything else, this reminds me of those occasional Simpsons episodes where they try to show the human side of Mr. Burns, just because they've run out of all other ideas.
But we also learned that there are STILL dumbasses in this world who don't know about the whole headshots-to-zombies thing. You'd think by now, pure trial and error would have revealed that factoid.
None of what I've said thus far is a major spoiler, unless people still wanna try and claim that a fact revealed in the intro is a spoiler on a par with Bruce Willis being dead the whole time. I leave the comments below for you to spoil in detail.