Just tryed it. Sketch as fuck. The hill behind my house is about 700 feet in vertical, and its steep as fuck, tight trees, hardcore east coast shit. I did it with like, a chinsy mining worklamp, one that flips down towards your face, and I did a flying leaf down a steep section, then jumped into the next open stretch, the light flipped down, blinded me, and I ate shit, in steep trees, in the dark, on no more than ten inches of snow.
I sessioned my booter and 21 foot rail though, and that was really nice with the light