I was out in my yard, and I noticed cottonwood fuzz already flying (pretty early this year!) and as I looked up at them, I noticed what I thought was a very high cottonwood fuzz. If you don't know what I'm talking about, the fuzz from cottonwood trees is VERY annoying! It forms big clumps in the trees, that constantly shed the fuzz, which are seeds connected to cotton-like fibers. When it really gets going, it will cover your roof, your lawn, accumulate in rafts in your doorway, clog your gutters, etc. Individual "fuzzies" float with the wind; imagine a very loose, small bit of cottom; it flies like feathers. Anyway, I looked up at the very high one, and realized it wasn't a cottonwood fuzz, but some odd thing super high up. It didn't really seem to be moving around when I first saw it, but a few seconds later, it darted across the sky, so I thought it must be a satellite that was catching the sun light at the right angle for me to see it. It went across about half the sky in just a few seconds, so was way too fast to be a jet. But then, it slightly jagged in its trajectory; like a parenthesis along an otherwise straight line. I've never seen anything that I didn't think was either just a jet or a satellite, this was definitely a UFO to me. Anybody have any ideas on what this was, or seen anything like it elsewhere?