I was behind two cars on the freeway, one in lane 1 and one in lane 3. They both decided to merge into the center lane at the same time. I remember the sound distinctly because it was so different than I expected. It sounded like two large, empty cardboard boxes hitting each other. No screeching tires or glass breaking sound (both windshields and side windows broke, but remained intact). It was very unexciting.
That duck is looking pretty tasty right about now.