The moment you decide

It's Saturday morning. You're in the kitchen, your partner in the living room. There's a dull thud. You run in.

They're on the floor. Not answering. A coffee cup broken beside them.

Three seconds pass. Four. You go very still.

What do I do first?

That moment decides the next hour — sometimes more.

First aid isn't an expert topic. First aid is what you do before the professionals arrive. Most people who survive a cardiac arrest owe their life to a bystander who acted in the first minutes — not to the ambulance that arrived five minutes later.

This module is the start: the three things that always come first, and the one phone number you have to know.