Freeriding's all about being in the right place at the right time, according to Xavier De Le Rue. The Frenchman found himself in just such a situation on a recent trip to Engelberg with Johan Jonsson:

If you want to see all that goes into getting Xav's mind-bending footage and photos, enjoy the whole episode. However, the 'right place and right time' of this one is at roughly the 5-minute mark, when they finally drop in. Skip there if you're pushed for time.