Strange half Rainbow above my head. Feb 2016

While sitting in a park in north London Last year I looked up to see a very strange half Rainbow directly above me reflecting off a very thin cloud. Apparently its called an upside-down rainbow and is an unusual phenomenon caused by sunlight shining through a thin, visible screen of tiny ice crystals high in the sky. Interestingly enough, it has nothing to do with rain. 

Needless to say I still killed all the first male borns within a mile radius just to be safe...