3 bright flashes like lightning

I was driving northbound on the 605 freeway it was between Whittier and Montebello. It was in the evening between 7:00pm to 7:30pm. Traffic began to build up then to a complete standstill. Then all of a sudden 3or4 bright flashes of bright green hues like lightning without bolts coming from the ground not the sky. Then traffic begins to move as I drove more down there was a 3 car collision on the southbound 605 carpool lane no fire. Very weird thought bombs were being dropped.