Green flash (at the northern part of solar disk) during the transit of Mercury (as a point in the center of the lower part of the disk, above the cloud stripes) at sunset.
Canon EOS 60D, telescope Sky-Watcher BK P2001 EQ5, solar filter from Baader AstroSolar visual film. This image was stacked from frames from the video (ISO-6400, 1/60 sec.): https://www.youtube.com/watch?v=pkIo64CUijU