I have been waiting a long, long, LONG time to get a chance to photograph an example of rare mammatus clouds. Wouldn't you know it that I'd finally see some while driving along the highway at 70mph.
The drivers behind me must have though I was nuts slamming on my brakes, and I got a few strange looks from the cars whizzing past as I stood there on the side of the road with my tripod.
But this was too good of a chance to pass up...
This shot made it to number 1 on Explore on June 11th!