Yep Bob, great description. Our Sifu had us go to the mall (told us to in good faith) and watch folks walk to see the various methods. I gotta say, around 80% at least are 'fallers'. They just fall onto that other leg over and over.
What I like are the side to side 'leaners'. They are usually overweight a good bit, and wadle or lean significantly to the side every single step. Plus the head bobs up and down.
I used to march in marching bands when younger, and we had to, of neccessity, learn a stepping method from the older students that would allow your head to remain positively level at all times, so you didn't bust up your lips on your instrument.