I heard this in the news and it totally bugs me.
That is the classic example of why we do NOT weld or flame cut any type of container until we have personally verified it has been vented, flushed, cleaned, and re-checked for a neutral atmosphere.
Hell, even neutral atmospheres can blow up if heated too much without proper venting...
It is a shame that the young man didn't realize the dangers himself, but it also shows a failing of the schooling he had, and the company he was working for. In my opinion, all three parties bear responsibility for this.
Hopefully he will learn from this, continue in the trade, and teach others about what happened to him.
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