Hi fantastic,
Our safty pages explain how to ride in a safe way (absolute safety doesn't exist of course).
So if you throw yourself on a crowded piste full of skiers that are running at 100 km/h, you will certainly have a problem...
If one of your binding break and you try to stop with the edge of your board, sure your leg (the one that is still on the board) will not like it.
Anf if you lay down turns without gogles and hat, you will get a lot of snow directly on your face.
zwelgen and db, your are right to worry about your shoulders. But in fact what sometimes happens is