Occasionally in the mountains you get some very peculiar cloud formations. Some look almost computer generated in their unnatural form. This streaky type are our favourite. Often formed over only the highest mountains. This one held an extra special surprise for us. Over an hour or so it unfolded and billowed and flowed out across the sky, darkening with intensity and anger as it conquered the space above our heads. A rain storm grew swiftly from within the innocent looking streak of a cloud and cloaked us in grey as we ran the gauntlet of swelling streams down to our hut for the night.