Considering human perception and reaction times, you are placing yourself at a tactical disadvantage by giving the person an opportunity to "comply" with your request by moving her hands toward her waistband, a primary "hot zone." If you told her to do it, you must allow that movement. How quickly can you distinguish between a person who is compliant, and one who is moving toward a "hot zone," intending to arm herself? How quickly can you react to the threat? Use a training gun or training knife, and work through some scenarios; you'll see what I mean.
Next, if you agree the rear waistband is one of the high-risk "hot zones," you should avoid obscuring that area with the person's hands. Although proponents of controlling the hands in this location claim they adequately search the rear waistband area, when I make observations in the field, I see just the opposite.
Thirdly, once you have a hold of the person's hands, you can use this connection to your advantage should you need to overcome resistant or combative behavior. How much control can you effect over the person with his hands behind his back at waist level? Some, but not as much as you might think. Advocates of this hand control position suggest disengaging from the person by shoving her forward.
As I mentioned before, you are innately wired for forward movement. Throughout our lives, we crawl, walk, run, and stumble forward. Our central nervous systems develop an orientation bias toward forward movement. We become adept at recovering our balance moving forward, but not backward. An aggressor's ability to recover her balance directly corresponds to her ability to re-initiate an attack. You can use this to your advantage, controlling an aggressor's balance by breaking her vertical plane in a backward direction, rather than forward. To do this most effectively, the subject's hands should not be at waist level.[PAGEBREAK]
"Hands on Your Head!"