This will inevitably come out to be not accurate for human executions. And it’s sickening to think about the number of victims will be tortured before the courts put a stop to it. Once again theirs a difference between none sentient animals unknowingly asphyxiating or a terminally ill person who’s on other drugs to make the transition easy. But go on. This idea is no different than what was found about lethal injection, the electric chair, and the first gas chamber. (people were adamant about those being quick and painless until the glaring evidence became to large to wave off by animal experiments.) Sad to see so many people not have a sceptical eye on how the government chooses to kill people.