This was in and out of my 3 choices for the Alt-Jury. Must confess, you nailed the title, but even without it, the image crept into my heart the first time I saw it. The viewpoint, the waving hands, the smile, it's all so personal. An image to treasure. Thank you for sharing it.
Elements of suburban life exposed. We are constantly greeting and leaving each other, so much rushing around that our true selves are replaced by faded apparitions, always coming and going, leaving and waiving and greeting and au-revoir-ing.
On a visual level, very nice compositional lines, the garage, the car window, a nice shot of the woods. Goodbye it is.
I feel I am the wavy arm, I am there. I see the emotion of the response, a chance capture of everyday life that is the reality of our memories. Such a real image and feeling, something to hold and recall in the gathering of loved ones.
To dismiss this as a snapshot would be a great loss. And maybe it is a snapshot. (I hope it is.) Meaningless definitions aside, what we have here is a beautifully captured farewell. The longer-than-handheld exposure has captured not only the woman's smeary wave, but a ghostly hand (the photographer's?) waving back. The license plate adds local color. The mirror and A-pillar not only enhance the composition but also add point of view. I would love to see this as the first in a series, maybe a photographic travelogue from behind the driver's seat.