This is a photo that I took on the plane of the skies as we approached Frankfurt.
Our flight out of Oslo was delayed by an hour because of poor weather conditions in Frankfurt (and as a result, we missed our connecting flight out of Frankfurt).
When the pilot announced that we were about to commence descent into Frankfurt, the plane flew past these clouds. These clouds were nothing like the nice, fluffy, cottony clouds that we see on a bright day. These clouds were thick, grey, like a bed of tightly entwined springs. They looked so freaky, as if they would suddenly swallow us up, and I was kind of scared for a while.
Maybe this is how dark clouds in a thunderstorm look like from above.