I knew how to do both Heimlich and CPR when in high school. We all had to learn it in a Health class that most of us took the freshman year. Of course, I didn't go to school in Indiana. (obviously!)
We even learned how to conduct a self-Heimlich using a plain deskchair in the event you found yourself choking without assistance nearby. I'd imagine it would be difficult to maintain composure when you feel your air being restricted. The experts even advise curling your fist into your gut and pumping rapidly with all your strength. At that point, you have nothing to lose.
~ Blue Jays ~