 Okay? And they are its gyroscopic organs that enables it to stabilize. And it's kind of like, just think of like you're on a bike. You're driving on your bike and you're steering with your handlebars. So that is steering along. But they are reacting to tiny little changes in atmospheric. So pressure, wind direction, all of these things. And they are basically the best stabilizers. So they enable flies to be aeronautical masters.