Driving back home from college with my girlfriend on the way back I glanced at the sky and notice a light yellow circle in the sky at first I thought it was a star but I noticed it was to large and to close to be a star it was large and in a still postion, about 4 seconds later it flew away at lightning speed and vanished in a blink of an eye leaving a small line of light for less than a second. I asked my girlfriend if she noticed what i saw and regretfully she didn't see. 2 months later she notice a ufo as well and has reported it already.