Best extreme DVDs?

[k@not]

Hi,

We're hoping to have a dubstep party at the club where I work, and would like to
show some extreme sports videos during parts of it. We want to include some vids
of extreme kiteboarding. Can anyone suggest what they feel are the best vids
available?

Also we'd like to include other sports if anyone has good suggestions about vids
for:

cliff snow skiing and skiing/base jumping
kayaking over waterfalls, running gates, and freestyle extreme stuff
snow and wake boarding
surfing
skate boarding and roller blading
mountain biking

Thanks for any suggestions!
David