8) An EF5 tornado, rotating at more than 200 mph, is a rare sight even in Tornado Alley. But storm chaser Reed Timmer and friends caught up with this one — and almost vice versa. It was the most severe storm in the deadly Great Plains Tornado Outbreak of May 3, 1999, generating the strongest winds ever recorded on Earth. Timmer says this is what hooked him on storm chasing, which he's been doing for 10 years since. He's also gotten better at holding a camera steady since then. See this video for more footage of the '99 twister.
7) This giant wedge tornado was filmed a few hundred miles north of Tornado Alley in Manitoba, but it'd be right at home in Kansas or Oklahoma. It gives the storm chasers a scare until it settles into a groove and churns around in place, but what it lacks in mobility it more than makes up for with size and power.