It might not look natural, but it looks flipping sweet.
Thanks, glad you like it!
Check out the photo I just posted on the HDR thread if you want to see a sweet looking sky. Here's the original with just some lightroom edits to contrast with the other one, personally I like the edited version better but maybe the sky of the second one with the foreground of the 1st would be the best.
If you like that look, I highly reccomend looking into Nik software's products. They just got bought by Google and I believe have an awesome sale going on for their whole bundle, I use HDR EFEX PRO 2, COLOR EFEX PRO 4, and SILVER EFEX PRO 2 all the time!
_D3_9624.jpg by Arob1000, on Flickr