 if you see a teen or adult suddenly collapse it's important to act fast helping to save a life is easier than you might think just start hands-only cpr the first step is to send someone to call 9-1-1 or call 9-1-1 yourself then get directly over the victim put the heel of one hand in the center of the chest then put your other hand on top of the first then push hard and fast in the center of the chest until help arrives