From: Book 7, On The Nature Of People; Ways That People Kill Each Other , Methods Used For Unauthorized (non state-sanctioned), Killings:

Hanging, Guillotining, Poison In Liquid Forms, Poisoned Gases, Electrocution, Drowning, Various Methods Of Depriving Victims of Oxygen, Dropping Heavy Objects On Victims (pianos, anvils, loose parts of buildings), By Crashing Things (cars, boats, trains, airplanes, blimps), Bombings, Cannonballs, Flack, Garroting, Strangulation, Knife Wounds, Bullets, Keelhauling, Time Bombs, Freezing, Boiling, Crushing, Scaring (with the result of heart attack), Chopping Or Cutting Up The Victim, Draw And Quartering, starving, Burning, Cement Shoes, Pummeling, Pushing Victims Into The Paths Of (usually) Fast Moving Things, and Pushing People Over The Edges Of High Places.