ATTENTION, Please hide at the back of the store immediately. I'm at a Bluemart, on a diaper run with my kids, when I hear the message over the loudspeakers. The other shoppers descend into a panic. And so do I. There was a tornado warning earlier—is it about it hit us? But as more messages come over the speakers, it seems to be something else entirely. Attention, please stay out of sight of security cameras. Attention, please hide all food and open wounds. My husband, kids, and I scramble for a hiding place. But I hear something coming down the aisle, and I can't help thinking- This is how we die.