Driving north on I-5 just before the last bend in the freeway before exit 36. Was pacing an Amtrak train and looked to make sure I was still pacing the train when I saw a bright, low object over the Columbia River that looked to break into two pieces then dissapear. There was no trail like a meteor would leave. Seemed too low and too fast to be a plane. I posted to facebook right away to see if anyone else saw it cause it was just to weird.