The “Crown Flash” is also known as “Leaping Sundog.”
They’re apparently rare. According to a 1971 Nature article, “ON July 2, 1970, at about 1945 h EST a thunderstorm cell passed a few miles north of Ann Arbor, Michigan. The column of cumulus cloud towered in the light of the setting Sun, far above the dark mass below, which occasionally flickered with lightning.”
Here’s another one: