Hi Wayne,
I had to go all the way back to a holiday in Tenerife in 2009 for this, at least it isn't a zoo shot.
Nikon D5000 + Sigma 18-250mm VC: 250mm, 1/500s, f/11, iso400
(Tenerife3-5929)
Hit Kbd F11 and click image to see at 1,590px × 946px
No idea what it is, but it was snapped on the big volcano there (Mount Teide) during a coach trip stop.
It moved fast, I swear I had movement blur at 1/500s
Between rapid movement, it paused just long enough for you to
start taking a picture, but by the time the shutter had fired, it was moving again!
I had to get quite agressive with selective sharpening to make it look half decent (best viewed in Lytebox).
Not sure if it is all blue under the brown volcanic dust.
Nice series Kim.
Cheers,