If you’ve seen Twister or Stormchasers you’ve probably come away with the idea that chasing tornadoes is a fun-but-somewhat-dangerous hobby. Lots of people think that way, enough to cause traffic jams in areas under threat. But Tim Samaras wasn’t a hobbyist and his work produced some of the most important information on tornadoes ever. His uncanny ability to both find and escape major storms was legendary. Then came the EF-5 tornado in Oklahome on 5/31/2013.