Sometimes there are happy accidents. You just have to be there doing what you're doing, and you're handed a gift.
I have been trying to photograph fields being irrigated by the big gun sprinklers, figuring I might get some interesting light shows in the mist. While one readily sees rainbows, and this may make a nice enough photo, there's something about the whole process that I find intriguing, from the huge rigs used to get water out into the field, to the rhythm of the spray. I particularly like the way the incomplete color spectrum suggests that the field is on fire.