First Time Post. I am a first aider and I really hope I never have to do CPR as it was made very clear to us in training that your chances are reviving a patient are very unlikely and it will be unpleasant and stressful. They are not suddenly going to sit up coughing and spluttering and revived. However it was stressed that you are at least giving them a fighting chance and you do play a role in calming the crowd, sending scouts out for the paramedics and generally trying to make a terrible experience bearable for all concerned. I was a bit daunted by all this at first, but then I realised that I simply could not try and help in these circumstances and at least if I've had some training, it's better than none.