The whole time I was watching this video of Marshall Miller base jumping into Lauterbrunnen in Switzerland, I was screaming inside. You see the entire jump from his perspective, as he looks down and around and can't see anything but fog and yet he still makes the jump. And, as he's falling down, you still can't see what's beyond the fog.
These jumps always require careful planning but this one is just crazy. It's like a blind jump.