Clouds behind the Moon?

I searhed and made questions about "the clouds behind the moon", but almost no information on this topic. I was not able to find more information.

The only information so far is:

“No, Clouds are never higher than about 8 miles over your head most are only a couple. The Moon is like a million miles away and is always behind the clouds."

So then, What is going on?

This is a strange phenomenon and probably somebody has an answer for it? Any answers? What is going on?

I also found this video where you can see clearly how the clouds are passing behind the moon.

More people took great photos here are the links: http://www.flickr.com/photos/romeo66/3885313156/