1. Have a sheer drop at the side of the slope. Get the turn wrong in the snow centre and you bash into a wall. Forget to turn and you hurtle into the wall at the bottom. Get it wrong on the slopes and you could disappear off the side of a mountain and be eaten by wolves.
2. Have a wind and fog machine to suddenly reduce visability to zero and blow you whichever way it chooses. Where is that drop again?
3. Have people zoom past at a hundred miles an hour missing you by centimetres as you stand rooted to the spot wondering how you are ever going to get down alive.
4. Have a bar at the top of the slope. Drunk people hurtling past is even more realistic. And a bit of dutch courage could be just what you need!