It's an intriguing insight into a particular kind of obsessive drive, and a portrait of a man who, as one of his contemporaries remarked, feels almost too comfortable on the side of a mountain.

Leclerc's story goes in a slightly different, somewhat unexpected direction. The film-makers' enthusiasm for his clarity of purpose is all well and good, but it does leave the film prone to hyperbole...

The film is too pedestrian to really share Leclerc's spirit - but it captures some of his ascents in scenes both hypnotic and terrifying, and in those you sense you glimpse the essence of him, wholly in the now.

Ups the ante on 2018's "Free Solo" by quite a bit. Imagine climbing 9,000 feet using crampons and ice axes to hang off 8th-of-an-inch rock ledges and shaky ice pillars... with no rope. Not for the faint of heart.