I was already laying prone photographing shorebirds when this Great Egret made an impromptu fly-by. I spun the top dial speedily 5 clicks to the right to raise the SS by a fair bit to expose for the bird's whites (but did not deliberately keep track in the heat of the moment, I just knew I had to raise it and hope it was good). It turned out to be five clicks, for + 1 2/3 stops, and it turned out just about perfect. Between that and keeping relatively level and keeping the bird well positioned in the frame from my prone position I was pretty happy with the result. I still did have to rotate the image CW by 1.5 degrees in post, but all's well as I still had to crop for comp anyways.
Canon 7DII + 500mm f/4 II + 1.4TC III, manual exposure, evaluative metering, 1/5000s., f/5.6, ISO 800, natural light, HH, about 70% FF.