Just before 8:35pm pacific time, i'm driving away from the facebook building in menlo park. i look north east towards the bay and i spot a bright large blimp/oval like ufo. it was moving interestingly slow for a large object. i decided to park the car and record it. interesting features include strong white with hint of yellow lights with a red blinking light at the bottom center of the craft. it almost had a bulge on the top center but could not tell very well. the front of the craft had a more rounded curve while the back had a sharper and smaller curve, almost egg-shaped. it took about 8 minutes to move ne to south. that's when i decided to drive towards the freeway and try to spot it again. unfortunately, it got farther and farther away and after about 40min of driving, i lost it because the trees, buildings, and freeway direction obscured my sight. the initial approximate location under the craft was ~250-500 ft above the dumbarton bridge connecting fremont and east palo alto, and last seen heading towards cupertino which is about 5miles from san jose.