UFO Sighting on my way to work

Well this isn't what I was originally going to post today, but I figured I better do it before I forget to.

Here in Hillsboro, OR today at around 5:30am while walking to work I saw another UFO that in many ways was the opposite of the fading blue one I saw years ago.

It was fairly dark out, but the sun was just beginning to brighten up the sky and I was enjoying my walk and listening to music, when I looked up at the sky in a roughly northwestern direction. There in the dark navy blueness of the early morning I saw what appeared to be a faint star, but then it did something I've never seen a star do. Suddenly it slowly flared out to about 3 times the size it was, became a whitish orange color, faded for a fraction of a millisecond (didn't even get back to it's original size), then bam...it was gone.

I poked and prodded what I saw all day in my head trying to figure out what it was. I know for a fact it wasn't a star, since stars twinkle and don't grow to 3 times their sizes and vanish in seconds. It was also definitely not a plane as there were no strobes or colored lights with it, plus planes also don't grow in size and vanish. I thought maybe a meteor coming dead on towards me and burning up in the atmosphere, but then well it'd a bit more obvious then a growing light in the sky I think.

So what was it? I don't know, however I will say that the way it behaved reminds me of seeing the engines of ships in Star Wars go into hyperdrive. First the engine appears normal, flares up, fades for a fraction of a millisecond, then voosh...ship is gone. It was almost just like that.