Original title is "Space firms fined by feds" and article addresses both SpaceX and ULA.
Presenting it as exclusively about SpaceX is misleading.
tl;dr June 26, 2014 “An employee rode in the utility trailer to hold down the foam material during transport exposing him to the hazards of falling out of the trailer and striking the asphalt”
Considering how many things that go boom they must deal with on a daily basis, that's surprisingly mundane.