http://d.yimg.com/kq/groups/7769081/124862335/name/Tornado1.wmv
This video came from a fellow who works for the RR as a train dispatcher. Every once in a while he sends a cool video involving trains. This is one of them.
Trains nowadays mount cameras in their cabs, facing forward and backward, the same way police cars do. This video is a rearward camera. This is video of a train that ran through a tornado..
First there is the normal rearward view from the last of three engines, with the trees looking normal. Then you begin to see rain, and then, halfway through the video the trees begin to sway violently . . . and then the "fun" begins.