Actually kind of happened to me in my old SD. driveshaft fell out of the truck i was following, luckily it didn't fly up into the windsheild but it did destroy the oil pan and puge a huge rip/dent in the spare tire well. Scary stuff,

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83 300SD.......sold
96 integra SE....sold
99 a4 quattro....sold
2001 IS300.......sold
2002 330i.........current.
2004 highlander limited....current.