Nope. It was a derailment of a vintage CTA train. What a crazy story (via the Tribune):
For about 40 train enthusiasts cruising the CTA rails Sunday, a chartered ride took a thrilling turn when one of their vintage rail cars derailed in the South Loop.
Chicago Fire Department officials said nobody was hurt when the train, chartered by members of the Illinois Railway Museum as a fundraiser for the McHenry County institution, jumped the tracks. Apparently, nobody panicked either.
"Just about everybody on this train is somebody who is experienced with the railroad, and it was no big deal," Harold Krewer, a retired Amtrak manager, said after descending from the elevated tracks. "One of the guys that is (a professional railroader), the first thing he said was: 'Well, I'm glad I'm not going to have to do the investigation on this.' So we were all taking it in stride. Nobody was upset or worried. It was just a little diversion in our day."
I guess it couldn't have happened to a better group?!?!?!
(Hat Tip JN & JW!)