Here is a pretty amazing car accident test video done on what happens when a large truck rear ends a number of stopped cars. In the video they have maybe six to eight cars at a fake Stop sign and they have a large dump truck sized truck which they slam into the rear car. The last two cars in line pretty much completely disintegrate under the force of the truck. The very last car is completely gone, the second to last car is a pancake between the third car and the dump truck and the third car crashs into the fourth car but the passenger area stays intact. If you look closely the very last car seems to get ripped off it's chassy completely like it was made of paper. They are using European cars and a European truck in the video.

Check out the full video of the dump truck turning two cars into metal shreds for a good time below or click over and view it on the host site.

Source: GoogleVideo