Walking on the grates on the sidewalk is scary enough. What if they give way? That’s why most people prefer to walk on the hard concrete. <br /> <br />AMC took the fear of the sidewalk grates to the next level in the Big Apple. <br /> <br />To promote their popular zombie show The Walking Dead they had zombies surge out from the grates as New Yorkers walked by. <br /> <br />Terrifying.
