I took a CPR class in the library at school. I'm pretty sure I saved 2 plastic choking babies, and one plastic adult. I'm not sure, 'cause they were still laying there when I was done. I spent the first half of the class going, "this is a really stupid class. I hope it's only an hour," to the last half of the class going "damn, I hope I never have to help anyone cause I'm better at sandwiches. I'm sure I'd panic." But I got certified, and I now know enough that if I see someone choking in the mall, I can run the other way so I don't kill them with my new training.
I was the only one, by the way, that asked if it was ever okay to make out with the person you're giving CPR to. You know, if they're cute. Not just the homeless dude with asphalt-flavored skin you'll probably be faced with. After that, the dad at my table kept saying, "making out," and giggling.
See, I give back to the community.