Barbell lifting, both the Olympic and and Powerlifting varieties are enjoying a bit boost from their inclusion in Crossfit’s syllabus. The snatch is by far and away the toughest of these lifts, and I have the utmost respect for anyone able to snatch their own bodyweight or more, let alone the champions who are closer to double their bodyweight.
For mortals, here are some resources to help learn this complicated lift, which demands a lot (and I mean a lot) of flexiblity, coordination, balance, speed and strength. Again Faster have a whole load of good videos for Crossfitters on technique, here their snatch series:
This is Mark Rippetoe, but on the power snatch, still I like some of the cues he uses:
Glenn Pendlay at California Strength’s approach a bit different: