This is a good drill for law enforcement officers and also for regular people. As a soldier I can manhandle the people I need to restraint without much worry to their health (bruises or broken limbs) or how it looks like on camera. Take a plastic cable tie and close it just enough to form a loop and try to pass it over your partner hands or feet with him resisting. This is not so easy if you want to keep from creating pain or serious restraint on them. This also teaches how much space and possibility for movement exist for both sides and with a third on the side with a stick you will learn to pay attention to your environment as well. Next do the same drill using your belt, a shirt or anything else you can restrain with and see how the options change once you keep them open. Remember the purpose of the drill and maintain your inner calm by breathing and keeping your eyes relaxed.