Too often, the police of this world are not just capturing criminals. They are getting their "jollies" by inflicting additional pain. It is no secret that police all over are the same personality types. They are aggressive and refuse to lose a fight. But once they have you down, and you have clearly no other choice but submit, they have to rub salt in the wounds. And just like that, you've been Tazed.
US rally shows support for ex-Marine held by Iran on spying charges (AP)
from the article: Abuse of stun guns