This is the best version of "Glissage Practice" I've ever seen.
For those of you that want practice at glissading, watch this video and take note that if you try to climb with out the proper gear, crampons, ice axe, helmet - this could be you - and remember that there's no pool of water to catch you at the other end of the "Glissade"

http://www.youtube.com/watch?v=lkwh4ZaxHIA
Definition of Glissade!

glis·sade (gl-säd, -sd)
n.
1. A gliding step in ballet.
2. A controlled slide, in either a standing or sitting position, used in descending a steep icy or snowy incline.
intr.v. glis·sad·ed, glis·sad·ing, glis·sades
To perform a glissade.