I was at the local farm last fall setting up for an HDR shot. My final image can be seen below.
Lesson learned: You can be very picky about aperture, tripod choice, exposure time, lens selection, and all the rest, but you can’t beat an impetuous kid from running into your shot.
(And, yes, this photo could work well on its own if I spent a little time tweaking the colors in Lightroom. The point of this one, though, is the kid running into frame.)