In the late 70s, early 80s, when I was somewhat actively enjoying my private pilot license, I would take off from Van Nuys with a couple of friends to watch the multitude of fireworks displays from above. It's incredible how many there are over areas like the S.F. Valley and L.A. Basin. From a few thousand feet up they look like they're exploding right on the ground, but those colorful little explosions are beautiful, popping up here and there all over the damned place.