Noticed something strange...anyone familiar with it?

[Rado]

My X has the Depo lights for a couple of years now and the angel eyes are always on when you start the car. They work perfect.
Today I was coming home and turned off the car, removed the keys, opened the door and was ready to exit when I noticed all of a sudden that interior lights and panels came on and headlights came on as well. I did not touch anything or turn the switch on. I went outside and noticed headlights on, angel eyes were off.
I put the key in the ignition and turned on the car and all came back to normal, only angel eyes on, turned off again and all back to normal. Exit the car and locked it.

Have anyone noticed this strange behavior. I've never seen it before and wonder if it will happen again. Very strange...