Exploding Zombie Cock

The powder was in the top cabinet, behind packs of organic barley and quinoa that we never use. I unwrapped the plastic and took out the bottle. I put on a pair of wash gloves and carefully unscrewed the lid, catching a faint whiff of something, thick, clotted and musty, like a crypt filled with dead spider's webs and moth's wings. I took a tea spoon and scooped out a tiny pinch. It was a dull gre...