Originally posted by Vulcan 
I remember this clip, two people died, a man and a woman who had just stolen a lawn mower.
Yes... a lawn mower. 
 I remember this clip, too.  It was featured on "Wildest Police Videos" or something like that.  It was a long chase and the mower in the back caused the truck's stability to be compromised.  Whenever the guy tried to take a high-speed turn the truck would almost get loose.  The man was driving, his lady friend was the passenger.  The driver of the tractor-trailer suffered some injuries as well but survived.
Its a good way to remember to look for oncoming traffic when crossing an intersection!