3 Large disk shaped clouds over the Burbank CA Airport

Driving home from work I saw what appeared to be just 3 very large purple/grey oval shaped clouds of the side of the Burbank CA airport (where it's known that at one point they were hiding the stealth bomber). I live 2 blocks from the airport. As I got closer to home, the clouds caught my attention because they seemed to be shape-shifting without loosing mass or volume. At one point they almost looked like ancient asian symbols. The firt one I could not make out, the second one looked like a perfect mushroom, and the third one looked like a an ancient writing tablet. But what shocked me the most, was that the 3 clouds became oval shaped again! Getting more and more definition as I shorted the distance ariving at home. But what grabbed me the most, was that once all 3 had good oval definition, and a smaller (but still huge) oval cloud detached from underneath one of the biggest clouds in a perfect round/disk shape opening. It seemed to detach, and re-dock back with the other ship. The clouds disipated a few minutes. I could not believe my eyes. But I try to dismiss it myself as just the weirdest clouds I have ever seen in my life! And that's why I also thought that it will just get dismissed as clouds by anyone else, so I have never shown anyone. 
And here is the kicker: I ran to my back yard, and I got to take some amazing pictures of most of the events!!  Please let me know if you are interested in seing them.  I do not want to send them to you just yet, until I talk to somebody (you contact me).
Witness indicates that the date of the sighting is approximate.  PD