We all know zombies aren't real, right? But, come on. If one approached you, looking pretty realistic, you'd undoubtedly either run off crying or swing at them with the nearest item-turned-weapon.
Zombie pranks are nothing new, but I love this one. I find it both remarkable and hilarious that some people seem totally convinced, in a moment of adrenaline-supplied survival instincts, that this zombie is not some cosplaying prankster.
My favourite is the girl laying on the grass, who — while screaming — gathers her things before running off. If you watch the deleted scenes, you'll see she was very creeped out. The zombie-player had to take his mask off to calm her down.
And remember, the best weapon against a zombie is to throw literature at it!