I am posting this here because of it's historical importance in the early days of storm chasing. A chase team from NSSL recorded this tornado on a video tape recorder and were the first to do so. The tornado it's self is is not very impressive but the storm's updraft has great structure.
http://www.youtube.com/watch?v=MHWDPXiNnNo
http://www.youtube.com/watch?v=MHWDPXiNnNo