This story is about the worse I've seen so far as to attention grabbing and not telling us anything.Of course this guy most likely didn't have anything close to a Provari in his pants pocket, but it's stories like this that don't help us at all......
E-Cigarette Battery Explodes, Burning Man's Leg
It's very sketchy on the details, it could very well have been a loose battery in his pocket for all we know. I'm not picking on you, just pointing out how poorly these events are covered.
If the media were educated, and actually cared, they would be taking these opportunities to educate about battery safety in hopes of helping some other hapless individual avoid such an incident.