But...how did they survive?

A truck carrying nearly 16 tons of explosives detonated in Utah. Check out the picture attached to the article; there's nothing left but a twisted piece of frame and some random parts in a crater between 20 and 35 feet deep and over two lanes wide.

Now, I'm going to assume that they mean that the trailer detonated and was vaporized, because the article goes on to say that the driver survived the explosion. How? How do you survive something like that? I mean, you've got a shrapnel-loaded firebomb going off, what, fifteen feet behind you? Unless there's some mundane explanation...man, that's amazing. Was the guy lucky? Or was the trailer designed to shield the cab from accidental detonation?

I'd prefer not to find out first-hand.