I found a fun photoshop tutorial a few days ago and finally got around to giving it a try.

Start with a sky you want to replace. I'll use this photo from a post a couple of days ago:

And a replacement sky. The tutorial is really for replacing a blown out sky in a photograph with a better looking sky. But that seems kinda boring to me. Let's use this image I found off the Interweb:

And... blend. Voila.

It's like the Jacques Cousteau version of Independence Day.

Here, try another:

Don't go into the front yard.

That is all.