 What you're going to do is blow all your carbon dioxide off. The more you breathe, the more the carbon dioxide leaves your body. And now your carbon dioxide, like that, right? Without exercising. There it goes. And now you're dizzy and feel weird. You feel like, I need more air. And you're breathing like a fiend. What the heck? I should have more oxygen. And it turns out you have less oxygenation because the carbon dioxide is gone and you need it.