I'm currently taking a first aid class at BYU and it turns out these things come in handy. Minutes after taking a test in said class, I was taking a break, reading the newspaper, and a man started yelling, "Does anyone know 1st Aid?!" I panicked and thought, "Oh shoot, mouth to mouth, here we go."
Then I thought, "I can't say yes, I haven't passed the class yet, I don't even know what I got on my test!" Nevertheless, I said, "I'm in the class, what's wrong?" He informed me his friend had started seizing and sure enough, there was a woman convulsing on the floor. He wanted to know what we should do. I couldn't remember for sure, but I said, "I think we just let her go." So we moved some chairs to give her some space. We checked her wrists for medical bracelets and her keychain for any extra information. We asked a man to call emergency services. They were there lightning fast (not always the case) and then, just like that, it was over.
I was lucky (or maybe she was lucky) that it wasn't more serious, but it goes to show you never know when you'll need those skills. So let's all take 1st Aid and be there to help each other out.