Rasmussen does this by strapping LED lights to his body and then leaving the shutter on his camera open.
He then quickly works his way up and down the chosen rock.
The resulting effect looks like a ball of energy is vibrating in short bursts across the landscape.
Fisher Towers near Moab, Utah
This removes much of the guesswork that usually goes into adjusting the controls for long-exposure images.
And, on this particular night, I was very happy to have that guesswork removed.
It turns out that even at midnight it is quite hot in the desert in August.
And that it gets even hotter when you put on a sweatshirt with a bunch of super bright lights.