What causes the speedo to freeze after a accident?
 

Kinda curious. I have seen a lot of salvage cars for sale with the speedo frozen at certain speeds, but I always took that as the speed at the time of the crash. However, here's the speedo from my Buell. Going about 30 mph on impact.
http://forums.pelicanparts.com/uploa...1410771678.jpg

Well that sure ain't what the speedometer says if it indeed "froze . Of course if it had you probably wouldn't be here taking to us too...