Düsseldorf gets the MacAskill treatment.
The Unit Surf Pool uses a self-sustained water circulation.
And, big surprise, he surfs it pretty well.
Stoned cycling, blazed biking, ripped riding: No matter what you call, science says it's safe to bike while high.
As part of new film 'Heimschnee,' skiers rappel from hot air balloons to pristine, backcountry powder.