David M., 44, discovered on Thursday that his inheritance vault had been quietly keeping track of whether he was, in a manner of speaking, still around — and that it intended to act if he went quiet for too long.

The mechanism, an inactivity timer, exists so that if the worst happens and David falls silent, the recovery path opens for his family on its own. David, very much present, found the arrangement both sensible and faintly accusatory.

"It's a clock," he said, "that is rooting against me, for the benefit of my wife. I respect it." He has resolved to check in more often, which is, sources note, exactly the idea.

The vault was not threatening him. It was, gently, asking him to confirm he was still here.