What’s one thing your nursing lecture class never taught you that you had to learn on the floor?

I was reflecting back on my time during nursing school and I remember being a part of a code and forgetting to plug the ambu bag into the oxygen on the wall. Even worse, when the RT reminded me to plug it into the Christmas tree, I was like “what?? it’s May” 🤦🏻‍♀️

What’s yours? 😅