Silent low flying aircraft over I-5 north.11:30 pm-ish.... There were three of us driving on the 5 north when my passenger could barely speak and told me to look up. I must say it was very clear out and there were absolutely no lights ahead of us in the sky prior to this. When I looked up, there were 4 blue lights, and some object hoovering about 30 feet above my car. The moon-roof shade was open and we could clearly see the whole object. As soon as we looked up and started to point at the object, it began to fly away from the car, covering what we discussed and concluded was about a mile at most in 5-10 seconds. The object stopped and started to land. It moved and turned in ways that we all have never seen anything do before. I must clarify this object was bigger than a jet but smaller than a commercial plane. About 10 seconds after it landed there was a helicopter that appeared in the sky ahead moving very fast toward the downed object. There were many other lights in the sky that started being noticed in the next few seconds much higher up in the sky but above where the object landed. This vehicle made absolutely no noise and covered a lot of ground in a very short time. The passenger in the back seat, as the object landed, became obviously frightened and fell into a deep sleep 20 min after seeing the object. The front passenger and I have had weird visions, tingling, and nervousness, nauseous, and other interesting things since seeing the object...it was like we had to fight something off inside our heads talking to us.