Polli apparently crashed into a tree while jumping in an area near Chamonix, France, that is popular, but VERY dangerous, for BASE jumpers.
One search and rescue official told NBC News that this isn't the first time they have been called out to the area:
"It's a location where there are a lot of accidents."
On Facebook, the World Wingsuit League memorialized Polli's untimely death with a statement to their followers and jumpers, writing:
"Alex was known for his hard-core proximity lines and that legacy continues to inspire new generations of jumpers for years to come. Besides jumping, friends from all around the world are going to miss his free-spirit energy and contagious laughter. We want to wish everyone touched by Alex's life strength for today and hope for tomorrow."
Ugh. So sad.
Polli, who was a dual Italian-Norwegian citizen, was known on YouTube for stunning jumps and incredible visual displays of his work.
With millions of views on his videos, Polli truly attracted all kinds of new people to the sport with experiences shown like this (below):