Whenever I walk across a bridge, I get the urge to jump. It isn’t a strong urge, I always overcome it easily, but it still worries me that the urge turns up at all. What if one day I can’t stop the urge, if I lean against the railing, hop over it, stand on the ledge, eyes closed, the invisible road beneath reaching up to pull me down? I’d never jump, I know, that requires an action, legs bent at the knees, straightening legs as I push my feet down and leap into the air. But falling…just lean forward a little bit too far, convince myself on the descent that it was an accident. I might be able to do that.