DeathfireD

That's actually something big they've been talking about this year for people renewing their CPR training. It's really common for people to give weak compression for adults which is why they're really driving home the "If you don't hear ribs making noise/cracking then you're not pushing hard enough" mantra.

How do they make sure that it's still active if it hasn't gone off on you in a year or two? Do you have regular checkups where they trigger it or something?