Grand Couloir Hardest ski run in Europe?

This ski slope is called the Grand Couloir often referred to as the hardest inbound ski run in Europe.
This is my first time skiing the run so I was a little unsure of where to go. The run is in the Courchevel area of the three valleys. I didn't have the correct skis on for these conditions really I should have off-piste skis hence the leaning back to help stop my skis from sinking.
The GoPro is mounted on my head and I am using the 2d speed measurement if my head is moving but my body is not it's still going to register some speed.
Let me know if you think there is a harder run in the alpes.