Or a knee kick in youknowwhere. Saw it once live being applied to an offender, I had a good laugh. He squirmed like a worm.
Nutcracker diplomacy.
But wait, there are those who say that violence is never an option and if you act with violence in self defence, then "you are no better than the aggressor"... Getting physically robust is never an answer, you know.
Well. It has saved me my life at least twice.