Dream about using a CPR machine?

I had a dream that I was in this some kind of punk/bikerish bar place and there was this small machine with buttons mounted on the wall. It was supposed to be for practicing CPR and it would give you a score in the end. To work you had to press and hold a button twice and this thing will rise indicating that you're blowing air into the person (sorry I don't know all these fancy medical terms). Then you had to press another button a few times to act as pushing down on the chest. At first I was nervous and shaky but then I got used to it and was going in a rhythm. Then when I pressed enter a bunch of numbers were showing up on the screen I didn't understand them or how the scoring worked. I think I saw the final number as 172 or something like that. What does it mean?

Its like you need some help ; and will receive it