Here's the speech I mentioned on Monday. Kevin Briggs was a California Highway Patrolman whose beat included the Golden Gate Bridge. When someone climbed over the rail and threatened to kill themselves Kevin got the call. In this presentation he talks about the people he talked back onto the bridge and hammers home the point; the most important thing to most of the people on the brink was not that someone convince them that life is worth living but that they just listen.
Perhaps most haunting, Briggs says the tiny percentage of people who jumped and survived, said later they were seized with regret during the five seconds it took to fall.