Dolph C. Volker studied the heart rate of sleeping cheetahs by sleeping with them. This takes a certain kind of dedication to science that most of us don't have. He says he couldn't sleep because Faith was having dreams. If it were me, I wouldn't get any sleep because my bedmate was an apex predator known for its lightning speed and ability to eat animals much larger than me.
This video only covers the first night, as Volker slept with Faith. You can see more of the ten-night experiment at his YouTube channel. Because nothing is more relaxing than watching a man sleeping with cats. -via reddit