First Aid is a really important thing to know. I participate in regular training organized by my company. It was second level with quite realistic situations to handle. It's really hard to imagine that when we have someone not breathing we shouldn't think that maybe we'll damage his clothes or broke his ribs as he is already dead at the moment and we cannot make his situation any worse. We can and should do just something that gives hope for living. Remember, you have 3-4 minutes to start CPR. No time to hesitate,