Floating mountain

I had to get up early this morning, well early for me, for my Covid and flu jabs. An unexpected benefit just as I was tucking into my breakfast  I saw this  "floating mountain"  viewed through the kitchen window.
 It lasted less than a minute, enough time for me to grab a camera.
( Blip done and dusted).

So far no side effects from my  jabs though I did learn something interesting. Why does one injection hurt while the other was totally painless? 
Because the flu vaccine contains a thicker liquid- hence the pain. Thought you would like to know...