So, do we all know the term "BLEVE"?
I really hope the kid in the first video didn't lose his sight, or end up with a horribly scarred face because of this. But assuming that he's OK, I can't help but laugh myself silly at it. I find this stuff endlessly amusing for the same reason I find Beavis & Butthead funny. Watching people doing intentionally stupid things when they obviously know better almost always results in hilarity. Someone suggested that for a followup, we should get this guy to "write his initials on a liquid oxygen cylinder with a blowtorch." Alas, searching on YouTube for "oxygen cylinder cutting torch" doesn't return any hits...