A dream - Some kind of explosion

Clint and I were touring a factory that made chocolate, and we watched huge chunks of it going down these ramps into machines that just tore them into component atoms for processing.  I thought it was a little more than was needed for chocolate, but what did I know?  I imagined a human going into one, and was immediately horrified.  I couldn't help it.  I kept imagining it.  I mentioned it to Clint, and he agreed... yup, that's horrible.  The tour ended and we were outside.  It was a nice campus, in California somewhere, with modern glass buildings and tended grass and ordered pathways.  There were a lot of people around, everyone going about their business.  Then somebody started yelling, and he ran by and brushed me slightly as he passed, and he was yelling for everyone to get back inside, get back inside, now!  I looked around and people were confused, and starting to panic.  I looked for Clint, but he was gone.  I ran up one of the paths to the top of a hill near one of the buildings so I could get a better view of what was going on.  I saw a few flashes, like lightening, and then felt something pulling on my arm.  I looked down, and little kid, about 5, was gripping my hand for dear life.  I got to the top of the hill and could see across the valley, which was being lit intermittently.  I dashed for the safety of a nearby building and the kid got left behind.  Then there was a blinding flash and the loudest sound ever, and extreme heat.