When I lived in Imperial Valley Ca. I got to watch the Angels practice in the winter at the El Centro Naval Air Facility. One weekend, we were camping out at the Superstition Mountain OHV right next to the bombing range. While tenting on a hilltop, all of a sudden, I looked over and was looking right at a Blue Angel pilot. (they were flying that low. Never heard him coming, but sure heard him as he was leaving.

They were out there practicing that low level fly over where they approach each other while upside down.

Some of the coolest flying I've ever seen.