Corski Alpinskis...

Just spoken to the lovely people at Corski, who have designed these amazing Alpine/downhill skates, so you can practice skiing off-piste altogether!

This video shows the speed you can get up-to on these things & was filmed by an uber-skilled BMX rider:

Apparently, the product has been in development for about 10 years & is just about to go into serious production - good luck to all at Corski with that!