I'm not a iPhone user, but read this article about the supposed incident. What do you think about a iPhone 'exploding'?
http://newyork.cbslocal.com/2015/02/28/man-suffers-3rd-degree-burns-after-iphone-explodes-in-pocket/
http://newyork.cbslocal.com/2015/02/28/man-suffers-3rd-degree-burns-after-iphone-explodes-in-pocket/