Dream of

I was with my good friend and a teacher by a lake that is next to the school I go to. I started to slip toward the lake and my friend reached to grab me. Then, she suddenly fainted. I ran to get help and my teacher brought her to some sort of emergency room in my school. After going into a different classroom to tell my teacher what was happening to my friend, I ran into the emergency room-type thing and apparently something worse than just fainting had happened to my friend, and they were using a defibrillator on her. I left the room because I didn't know if I was supposed to stay or not. After this happened, my friend was okay but she was weak and she needed help walking.