Going "hands on " is common. Ground fighting and grappling are taught in most Police Academy training programs.
You mentioned "gadgets " Would you be surprised to learn that Tasers are only effective about 50 percent of the times they are used by Police ? Why ? In order for the Taser to work properly, BOTH of the darts must penetrate the skin of the subject in order to create an electrical circuit that momentarily disrupts the subjects central nervous system. Many factors can cause an ineffective Taser deployment, such as thick winter clothing, sweaty skin surface, the subject is beyond the thirty foot range of the darts, and the big one...The subject PULLS OUT THE DARTS.
Somebody who is high on PCP ( an animal tranquilizer ) does not feel much or any pain, so the Taser will be ineffective. People who are high on PCP commonly take off all their clothes, because one of the side effects is a super high body temperature and heavy sweating. So now you have a sweaty and enraged person, who won't respond to verbal commands, and who has more physical strength than normal, due to the drug PCP. In humans, PCP acts as an exciter, not a tranquilizer.
Pepper . spray is another non lethal choice, but again it's effectiveness is hit and miss in the real world on the street. WHY? Wind conditions, the distance between the subject and the spray canister, and again the mental and physical condition of the subject. Pain compliance holds are taught, but again, in order to control a person who is actively fighting back, you need at least 2 to 4 officers to get the person on the ground, and control their limbs before hand cuffs can be applied.
In some cases where the subject is already hand cuffed, BUT they are still kicking, spitting and trying to bite the officers. In that case, leg shackles and a spit mask would be applied. In order to put such a subject in the rear of a caged patrol vehicle, 4 officers would be used , one on each arm and leg, and the subject would be placed into the rear seat face down, and the rear doors would be locked. Thats what is called "cuffed and stuffed ".
Punching somebody is not a good idea if you are a Police officer. You may break bones in your hand, and if you get cut by somebody's teeth, the chances are that you can get a raging infection from the bacteria in their mouth. A much better tactic is focused baton strikes, aimed at body joints like the knees, hips, shoulders and wrists. No body has ever died from being hit in the shins, but it sure hurts a hell of a lot. JimB.