Oklahoma governor signs bill allowing nitrogen gas executions

[noctalla]

What evidence do we have that execution by nitrogen gas is painless? I have long thought that administering a general anesthetic prior to whatever was one's preferred method of dispatching the condemned, could be a humane way to perform executions. I say this as someone who has been put under with a general anesthetic twice. The only way to describe it was that it was total experiential void. Perhaps a combination of anesthetic and nitrogen gas would be a good option, until we have good evidence that nitrogen alone will reduce/eliminate suffering?