Analysing terrain data
The exposure grade does not take into account objective hazards (stone fall, seracs, etc) but only the consequences of the skier falling.
Low Exposure (E1): Exposure is limited to that of the slope itself. Getting hurt is still likely if the slope is steep and/or the snow is hard.
Medium Exposure (E2): As well as the slope itself, there are some obstacles (such as rock outcrops) which could aggravate injury.
High Exposure (E3): In case of a fall, death is highly likely.
Extreme Exposure (E4): In case of a fall, the skier faces certain death.
You can get a good look at the drop off for this line while on the saddle chair, just look to your left as you leave the bottom station. This line is a series of cliffs that are well known in NZ.
They are pretty serious and you need to know what you are doing.
Just watch the locals hucking off them on a powder day for inspiration