Gray, Jellyfish-shaped object with lights seen in photograph taken of clouds.

My father and I were driving south on Interstate 5, and had just entered Mount Vernon, WA, just before the College Way exit, when I took the first of three pictures of the clouds on my cell phone for my boyfriend, who often remarks about the dramatic nature of Skagit Valley clouds.
I emailed myself these pictures from my phone, and upon downloading them that evening, I noticed, in the first picture I had taken, an object in the sky that was not visible in the sky when I took the picture: a large, gray, jellyfish-shaped object with at least four distinct legs and three prominent lights and two lesser lights. I have a much more interesting picture to send my boyfriend than I anticipated!
We believe that the object is either an insect, about to strike the windshield, or a crack in the windshield.  PD