A couple years ago on one of the many Chicago expressways, the brakes on a truck overheated and basically exploded, sending pieces of metal flying. One piece hit a car and killed the driver. Just a month or so later, a tire came off a truck and some cars ended up in the ditch trying to dodge it. No injuries, but coming so soon after the other incident, for a while, there was a feeling like "whoa, trucks are really dangerous" but we got over it.