Adventurer Fedor Sivkov has gone viral after performing a risky stunt in Prospekt Bol’shevikov, where he climbed a large tree as part of his ongoing cold-water diving challenge. The clip, posted to Instagram, has now reached 340,000 views.

On Day 11 of the challenge, Fedor described the climb as a way of stepping outside his comfort zone: “I made it to the top of the Christmas tree. The challenge is rising with new challenges that you cannot get past. Again, the choice fell in favour of not comfort—overcoming oneself is wonderful, aftertaste.”

Day 11 of the cold water diving challenge, I made it through the top of the Christmas tree. It was a challenge for me; I had to step out of my comfort zone, and this is how I did it.