i like making a stop sign with my hand and punching it. the cause and effect is marvelous
Take that same charge and try it with the energy that it takes to jump two feet off the ground, swing all the way around and kick at your chest level hard enough to lift a three hundred pound bag a foot in the air off its rope and shake the rafters.
After the 'teenth time it becomes decent exercise, too, especially if you can catch it on its way down with your fists, deflect its course and roundhouse it again.
The "Empty Hand" can be a good way of readying oneself for a meeting or an interview or even a shopping trip.
I can't tell you how many times I have gone shopping, secure that I will not be hurt, all due to some physical preparation, which has absolutely nothing to do with shopping - on the surface.