I suspect that people on the edge would be fairly different to one another. I suspect that the highest reliability strategy would relate to relaxing the person on the edge, but that's not why I'm commenting. If someone is literally on the edge, it would be useful to be able to make inferences about how rational they are being. If someone is jumping at less than 45m, they are probably doing it in hot blood or they are not very good at researching available balconies. If it's higher, perhaps they've made a considered choice, and you ought to be actually compassionate. Compassion is about empathy. It's not just about empathy, but that's one part. And when you put yourself in someone's shoes, you sometimes have to stop mentalising or acting paternalistic and help people do what they want to do.