Thanks to Henrik S. for this Truck Spill submission. Unfortunately, the story appears to be in German, which I do not read. Using Babelfish to translate the site, I believe the facts are…

In October, 2007, a truck carrying Russian rockets, or rocket containers, took a turn too sharply, causing the load to slip forward, indenting the cab, but not injuring the driver. Two of the containers then broke free, falling into the roadway. The other two shifted on the truck bed, but did not fall into the road. From the text, I believe the rockets, or rocket containers, were military surplus that was being disposed of.

KLSK