I woke up on May 20th at 4:30 , looked out my window and the sky to the south west above the clouds was a continuos light throb, not flashing but more of a throbbing in a 20 -30mile area one throb per second. Let me make this clear it was coming from the top of the clouds not belowand it lasted until 6:30. I would love to know if anyone saw this. It was right over PCHgoing to Manhattan beach from Playa del Rey, CA.I called channel 7 news and the police. The police finally got there when the sun roseand it was gone. The news... who knows. But that is how worried I was!I did grab my camera to film it but I do not have very good night camera.If you watch the film I have attached several times you can see the sky throbbing,I know this sounds crazy but I have not seen it since and I have been looking!Next time I will get in my car and go closer!