Very helpful, thank you. A follow-up question - Is it correct to say that somewhere around the beginning of #3 above, there will be more forward pressure between lead and follow, as the follow (if I'm reading you right) has not yet shifted her torso back - only her leg? So the forward pressure would briefly intensify, and then go back to the starting pressure, as the follower actually begins stepping backward? (And yes, I realize this all happens rather quickly in real time.) You're saying the lead initiates the step with his core, then moves his leg, while the follow begins her's with her leg, and follows with the core? Also, how does the follower know how far back to step? My assumption (based on prior experience, but also what people have written here) was that she knows how far to step back because the lead leads her to set her weight down, thus halting her backward progression (for that step). Is this incorrect?