Isnt death by laughing gas a technique for a painless suicide? Happy bags or something?

Sounds like he was trying to do a DIY one with a condom!

Laughing gas has been used since its inception as an illegal drug, so potentially he could have been just trying to get high. It is also an anaesthetic, so he puts the condom on to restrict the flow of gas, gives himself too much, passes out then asphyxiates.

Darwin award, unless someone can definitely prove otherwise.