One of the rarest events in mountain weather, a Brocken Specter.
Conditions of light,density of low cloud and mist and temperature all have to be spot on, and then you have to be in the right position for your shadow to be cast within the cloud.
Very envious that you were able to be in a position with a camera to capture such a glorious photograph.
According to Colin Pledgley in his various Guides on Mountain Weather, he has only encountered this weather associated effect once,in his many years of mountain photography.
I do hope you realise this was possibly a once in a lifetime event,it happens very rarely in nature,all because temperature,light etc have to be just right for it to happen.
Thank You for making my day.
Jelous as hell.