I was at work, in Vancouver WA near the PDX Portland OR airport, and I turned around to look out the window at the beautiful clouds. The sun was in my eyes so I moved my position so that the sun was just covered by the window frame. Just beneath the sun there was a cloud out of which a bright reflective circular disk type UFO zipped, changed directions into an upside down U shaped flight path then it disappeared in thin air. The whole thing happened within a matter of an instant. If I had blinked I would have missed it. I would have thought this was just a sun lit piece of fuzz floating in front of the window had it not: 1. flew so quickly and changed directions so quickly, and 2. vanished into thin air. Not two seconds after I saw this, a commercial airplane flew by. I was very excited, I have been waiting to see a UFO for quite some time now.