I remember learning CPR and the Heimlich maneuver in school when I was around 9 or 10. I'm not sure if I would have been able to do it, but I was never tested for real back then either.

Somewhat related question, why do grown adults ask me if I want a drink of water if I start coughing uncontrollably during a meal? I usually get up and walk away, but the offer for water doesn't cease. Something going down my throat is the last thing I want. If I'm coughing, that's a good thing!