Tsu

When someone says to 'put a bell on that god damn rabbit' enough times, they actually do put a bell on the rabbit. The rabbit however was never bothered by the bells and continued to blow people's brains out before they could even hear her bells jingle.
"Why?" you might ask, ah...that's because this particular rabbit, a trained assassin rabbit, was as first disheartened by the disability the bells give her. But being a stubborn individual, decided that she would blow everyone's minds instead. She trained night and day, and finally came one day where there was a case...a case of one of the mayors falling dead on the ground, and tinkling bells, but no person was seen to have made the fatal knife wound. The bunny is now able to move faster than the speed of sound, and that means that by the time you hear her bells, you're either dead or half dead.