A guy naming himself "Bomberguy" has put his nice collection of historic aviation videos on youtube, hardly any I've seen before. Among them a few crashes in slow montion that show the dynamics that occur during crashes.
Some are survived some not.
More interesting videos from bomberguy: http://nl.youtube.com/profile?user=Bomberguy&view=videos
So, that keep you'll from the street those dark X-mas evenings