Hypocretin is neurotransmitter that regulates our alertness and wakefulness. In 2000, it was discovered that narcoleptics all suffer from a severe hypocretin deficiency, which is why their brains sometimes forget that it's not a good idea to power the body down in the middle of a complicated figure skating routine. But recently, a group of scientists studying hypocretin levels in narcoleptic brains stumbled upon a control brain that once belonged to a heroin addict, and they noticed its hypocretin levels were off the charts. After inspecting five more brown-addled brains, they noted that each of them had an average of 54 percent more wakefulness cells than the average brain. And you know you're in bad shape when your brain has to make sure you don't nap your way into withdrawal.