The sound of an economy car getting stuck partway under an eighteen-wheeler (and, I think, getting dragged a short way based on where they ended up) is very different from the sound of two passenger cars striking each other.
(The semi is stopped partway through a left turn. It blocks both travel lanes and both parking lanes of Lombard Street.)
[ETA: The sound of the truck being backed off the car is ... disconcertingly screechy. (Actually, if I could count on all my readers to hear the French "an" sound in their heads when reading -- instead of the English "an" sound -- I would have attempted the onomatpoeia as "scranchy".)]