Julie lunges forwards to grab a plastic bucket in front of her. She isn't suffering from a big night out. She has paid £150 so she can be poisoned with toxic secretions from an Amazonian tree frog.

You picture the rainforest, naturally. A clearing at first light, a shaman with thousand-yard eyes, the canopy screeching overhead. What you do not picture is a fourth-floor flat…

Julie lunges forwards to grab a plastic bucket in front of her. She isn't suffering from a big night out. She has paid £150 so she can be poisoned with toxic secretions from an…