"A Stun Gun is an electrical self-defense device that uses high voltage to stop an attacker. Touching a person with the prongs on the Stun Gun will quickly immobilize the attacker. However, no serious or permanent injury occurs."
Stun Guns are for directing their electric shock into the nervous system. They dump their energy into the muscles at a different frequency than the pulse waves emanating from the brain. The pulse waves coming from the brain and those from the stun gun collide at the nerve's synapse, a type of complex processing switch adjacent to each muscle group.
The resulting energy collision makes it difficult for an attacker to move and function. The "energy collision" causes disorientation and loss of balance and leaves the attacker in a passive and confused condition for several minutes. Still, stun guns have no significant effect on the heart and other organs.
As a general rule, a one-half second contact from a stun gun will repel and startle the attacker, giving some pain and muscle contraction. One to two seconds will cause muscle spasms and a dazed mental state. Over three seconds will cause a loss of balance and muscle control, mental confusion, and disorientation.
Hold your stun gun against the attacker until they drop to the ground, and then you can get away and call the police. Stun guns have to be in touch with the target, so the prongs are touching the target since a stun gun cannot "propel" probes like a Taser.
Your goal must be to shock the attacker until they can no longer pursue you, whether that is one second or six seconds.
When you have to "shock the aggressor" in defense of your life, an electric shock will not pass from you to the person receiving the shock.