The “fastest flying woman in the world” Ellen Brennan speaks seductively of the feeling she has while leaping from cliffs in the French Alps, with possible catastrophe as part of the allure. (The average career span of a BASE jumper is six years, and it usually ends with injury or death.)

Brennan gave up a good job as an ER nurse for the full-time work of playing human flying squirrel, which clearly provides an even more potent dose of adrenaline and thanatos to a woman unusually hungry for the mix. And that—breathtaking photography aside—is the kind of insight director Kristoffer Hegnsvad is looking for in a doc that sometimes strains a little too hard for depth.

But it’s a fascinating subject, no matter how you slice it, especially when you consider, dear Vancouver, that Brennan considers bike-riding to be a far more dangerous and frightening activity than plummeting thousands of feet to the Earth.