Catching up...
Isolation works quite well but bg is still a bit too busy for me. Good pan, though.
Quality - I like the angles and white stripes you have caught, and I'll take your word on the quality of the car!
POST - very well done! I did a double take at this, it was so convincing.
Metal - good capture of the chopper in action. A pity the r/h blade is cut off but you probably didn't have much time to compose. On my monitor it looks a little washed out and I wonder if reducing the exposure in PP would strengthen it a bit?