Alabama executed someone with nitrogen in 2024 (I know other states have as well, but this was the first one I remember reading about), it doesn’t seem as quick and painless as one is lead to believe in writing.
A witness told the BBC that Smith thrashed violently on the gurney and the execution took around 25 minutes.
…
“I’ve been to four previous executions and I’ve never seen a condemned inmate thrash in the way that Kenneth Smith reacted to the nitrogen gas,” Lee Hedgepeth told the BBC’s Newsday programme.
Alabama executed someone with nitrogen in 2024 (I know other states have as well, but this was the first one I remember reading about), it doesn’t seem as quick and painless as one is lead to believe in writing.
https://www.bbc.com/news/world-us-canada-68085513