Tornados suck

For reference, here's what a train can do to a typical, modern automobile:

The moral: don't screw around with trains, because trains are big and heavy and if you get in your way they will stomp the life out of you, continue on over your corpse, and not really even notice that they've done so, because they can move quite quickly and even when they're not, they're still really quite large.

Now here's what a tornado can do to a freight train:

The moral: sometimes nature just says 'screw you' to human progress and ingenuity, grabs a freight off the tracks and throws it, just like an elementary school bully knocking a couple first-graders out of the lunch line.