Glacier skiing is not only a very challenging activity, but it also put human back in his condition, namely a small entity in a much bigger world.
The practice involve facing unpredictable monsters of ice that need to be well known in order to escape from it.
In the movie Altai, an amazing section is dedicated to this practice, in the underrated Altai region in south Russia. The cinematography is very well done and gives a good overview of the scale between human and mother nature.
Altai is now on Garage, so watch now: www.garage.com.au/movies/snow/8265/altai