I'll start with one:
Once I decided to dress in the middle of the day and go out in a park nearby, I rushed to put on my hose, heels, dress, but I didn't wear a wig or any make-up :O. I was driving through the local park, and I'm pretty sure about 2 or 3 people saw me, but it never hit them that I was even crossdressing!
Lame I know, but does anyone have any stories that they would like to share?