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It actually might be if you are not a well trained skier - The stars are racing down with almost 100km/h - I'm glad I was a little bit slower in the video :D

The reason behind this is, that they want to get a thick snow layer above the grass. The more the better. The more, the longer the slopes can be opened :)

Woahh. Skiing sure isn't for the faint heart :P

they want to get a thick snow layer above the grass

Ahhh I see. Makes sense as natural snowfall all season may not be reliable enough.