The Guillotine was still the official method of execution in France until the death penalty was abolished… in 1981.
There is a perfectly painless of killing someone through nitrogen asphyxiation by cutting off oxygen while still supplying nitrogen so that the body does not experience a suffocating sensation. However, this method is not used by any government as a method of capital punishment.
British soldiers executed Indian rebels by tying them to the mouth of a canon, then firing…
In 1946, the electric chair failed to kill Willie Francis, who subsequently filed suit claiming that he had been executed even though he did not die, and should be a free man based on ‘double jeopardy’ laws in the 5th amendment. A case was brought before the U.S. Supreme Court, with lawyers for the condemned arguing that although Francis did not die, he had, in fact, been executed. The argument was rejected on the basis that re-execution did not violate the double jeopardy clause of the 5th Amendment of the US Constitution, and Francis later went to the electric chair again and was successfully executed in 1947.
An ancient execution method involved solely hanging the victim upside down from the ankles with their legs spread, and sawing them in half from the crotch down to the head, with some victims surviving up until the belly button.