I was skiing from school at a ski centre. One of my classmates then suggested that we'd go one slope down through a forest route. I then followed him to that route. There's a sudden one metre fall at one point. I didn't know that. Also, it was behind couple of trees so I couldn't see it beforehand, though even if I had seen it, I probably wouldn't have managed to slow down. Suddenly realizing I'm in air in a forest with lots of trees nearby (duh) and tree roots on the ground was kind of a "Oh shit" moment.
Fortunately, I succeeded in not falling and evading the trees and roots.
Fortunately, I succeeded in not falling and evading the trees and roots.