Believe it or not I took this through my car's windshield in the parking lot of a Food Lion. I think my camera lens still had an ND filter screwed on for some reason. I didn't do any post processing to this image so aside from the slightly darker cast from the ND filter the sky actually looked like this and it is, to this day, one of my all time favourite shots I've taken.
Canon REBEL T2i
90mm · f/6.3 · 1/4000s · ISO 200