I like it. Be mindful of your background to try and avoid having poles, trees, etc appearing to "grow" out of the car, like in your first shot. Sometimes you just can't help it, but it's something to look out for.
Thanks for all the comments. When I first processed, I did it on my laptop, and they didn't seem to dark, but once I saw them online on my PC, I saw the darkness. I usually use the PC for more serious PP work, but I didn't in this case, so that is something I'll be mindful in the future.