I remember a while back, a truck ended up breaking something in the motor or driveline, and it actually ended up in the stands. Believe it ended up killing a little boy. Granted, the truck wasn't rolling or anything, just a freak accident, stuff does happen. I'm starting to get a little worried about trucks not being RIIed myself.
After a quick search, I think I found the news article. Says it's from Tacoma.
http://www.komonews.com/news/local/37765479.html