I was in line at a drive-thru one day and watched a lovely young lass in a tight mini skirt walk to her car carrying a computer monitor.
She popped the trunk on a mustang and leaned over to put the monitor in, when she bent over her skirt JUMPED up around her hips and I was rewarded with a lovely view of a bare backside sans undies, and I did get the full view!
She quickly stood up, wiggle/pulled the skirt back down, looked at me with an embarrassed smile and a little wave, got in the car and left.
I'm normally a boob man, but that definitely got my heart racing.