I coincidentally took this picture last Saturday not aware of the upcoming assignment.
OK, I actually did take this picture while driving at a little over 70 mph, but there was no traffic whatsoever and I really liked how the sky looked.
I didn't want to stop so I just held the camera with one hand and the steering wheel with the other. I was surprised at how well the composition turned out considering I couldn't look in the viewfinder. I obviously did some post processing but I like it better than the SOOC shot.
Exif:
Camera: Nikon D40
Exposure: 0.001 sec (1/1600)
Aperture: f/5.6
Focal Length: 18 mm
ISO Speed: 200
Exposure Bias: 0 EV