Keith I'm sure that your failed attempt is all to do with angles. In the interests of mankind and common decency, please provide me with an in depth, detailed diagram showing your exact position relative to the katana.
I will then hold conference with the greatest academicians in the fields of mathematics and physics, who will strive to calculate the exact velocity and angle of impact to ensure instant death. I expect a Nobel peace prize afterwards for ridding the planet of its most obscene sexual deviant since Edgar Hoover breathed air.