 There was a new study... Yeah, you are the bartender. Everybody should know about it. So let's say I was the flight attendant on the flight, and you're on your way to Europe. And you're 60 years old, and you basically are healthy. But you want to sleep. So what the researchers did, they took a group, it was a relatively small study, and they simulated altitude. So when you're in a plane, the oxygen level in the plane...