I just checked these out. The nitrogen one is totally legit. The helium one, however, is not an accurate representation of what suicide by this method would look like.
This poor bloke did not die as a result of inert gas asphyxia. This guy died by essentially blowing up his entire respiratory system (and much of his thorax) with high pressure because he used a pressurized gas tank without any regulator. In a word: barotrauma. When you read past the jargon-y medical terminology, you'll see that a bunch of gas flooded into his lungs, then "popped" them, causing some of the gas to escape and fill his chest, and then some of this gas was even forced closer to the surface of the skin, in areas like his face. Combine this with lots and lots of blood as a result from the trauma, and yeah...
🕊
