One of the coolest time-lapse videos of a tornado that I have seen in a long time is here . Screen captures  -- in order -- are below. The tornado's duration was more than 70 minutes.  Congratulations to Aaron for such great video and for sharing it with the world. 

The above video was taken by a person with a dash cam who drove through a tornado, panicked, and did a U-turn back into the core of the EF-3 Clarksville tornado. Click to enlarge to get the full effect. x You can see the above car in video taken by storm chaser video (below). It is the white car that does the U-turn.