Added zest.

Looked like just a bit of cloud on top of Rushup Edge - until this happened.  Visibility even worse thro' specs.  Even thought about the compass when I couldn't see the wall within metres of the track I was on......It disappeared in seconds in front of my eyes.  Also we don't have thick fog combined with strong winds at home.  The good - wind blowing me away from the edge.  The bad - wind from the north.  Once off the edge it was completely different.