No, not your guitar.
Then, what? Why, a particularly spectacular sunset!
No, you can’t always tell ahead of time, but when clouds are whisping about, throwing threads of fancy in the sky, you’ve got a shot (or two). These were all taken the same evening (Tuesday).
Above we see the glorious globe stealing the show at Beacon’s in Leucadia.
Skies like this must have inspired Monet. I can see why he spent weeks studying light at sunset and at sunrise. Here's a few more of the same in my flickr set.