May 2008
	UpFront

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The Most Terrifying Video You'll Ever See

Oregon science teacher Greg Craven became an Internet sensation when his YouTube video on climate change—"The Most Terrifying Video You'll Ever See"—went viral last summer.

Millions viewed it and thousands left comments, prompting Craven to spend his entire summer on part two. The result, "How It All Ends," was what Craven calls his "Magnum Opus and midlife crisis and nervous breakdown."

"Global climate change is one of the driving forces of my teaching career," says Craven. And now, with a global classroom, he's sounding the alarm to millions of people around the world.

"It's amazing how one schmo can post a video, and days later five million people can watch it—it starts with a few, and grows exponentially in a nonlinear way," Craven says. "Climate change shares that characteristic. When you cross a tipping point, it causes extreme agitation."

Ready for a good scare?