This line of thunderstorms had produced severe wind across the central Rockies for hours. A 110-mph gust report buzzed off the weather wire from Winter Park, CO, so I knew the expansive storm complex meant serious business. Being in western South Dakota already, I decided to make foreground of the Badlands. As this small segment of the 2020 Great Western Derecho struck, a wall of very severe wind roared up the bluffs from the lower Plains below, further accelerating the intense blast. This was the last shot before I ran the hundred feet or so back to my vehicle, threw my gear onto car-camping bedding and pillows in the back, and pointed the front into the wind. It rocked hard, shaking up and down with tremendous gusts, and certainly would have rolled if pointed sideways to the current. The closest instrumented gust measurement was 92 mph at Cactus Flat, a few miles to the southeast, as it went behind the apex of the shelf cloud at left.