Help Help checking suicide information reliability

[pezkeus]

I saw this cutting method tutorial on a Reddit page that I can no longer find. There were users discussing painless suicide methods and this comment appeared. It looks like misinformation, I can't state a conclusion.
Is this method reliable? Are these informations true?

 

[LunarLight]

It seems to require such technicality that the perspective of a failure is not to neglect.