Don't mess with Mother Nature.
Camera mounted in rear facing locomotive (I am told it was 4th out in consist of 4 engines).
It occurred in Illinois, earlier this year. Watch, especially to the left — watch the trees bend, debris in the air, and you can actually see the tornado pass from right to left.
The trestle seen at the end of the video was moved out of alignment to the left 18 inches — the tank car was a load of Ethylene Oxide — nasty stuff.
via Chris Anderson