With Sawbones at the far end, Sonia suddenly wishes she’d gone first instead. The yawning abyss between them is...very intimidating, and she feels suddenly exposed at the back.

“Coming, coming!” With a grimace like someone about to set foot in a grimy puddle, Sonia touches one toe to the bridge and...it does not immediately crumble out from beneath her, which is good. But it’s still a long way to reach the other side. “Honestly, who builds bridges like this...”