For this project you will need one cat toy on a string, a high-speed camera mounted on a moveable track, and also some cheetahs.

This behind-the-scenes video shows you how National Geographic and the Cincinnati Zoo captured amazing footage of big cats in motion. It's a complicated process and I wish they'd shown more of the animal-handling part of it. I certainly didn't realize that some zoo animals were so comfortable with humans that you could walk them around on a leash and let them off to run free around a dozen unfamiliar members of a camera crew. Still great to watch, though.

Via Laughing Squid, which has the 7-minute video showing the final footage of running cheetahs.