@Tim
"you should never do anything"
That's actually what non-trained people should do. Always. In the training they tell you to not less untrained people touch the victim, even to "help".
That's also what you can't do when you have a certification. You could end up in the brown 'n smelly. Non-assistance etc.
But if you intervene you MUST make sure there will be witnesses ready to testify that you did everything by the book, or you'll end up even deeper in. Only said witnesses don't know what's in the proverbial book, hence the "announce everything you're doing", "speak clear and loud" etc...
That's how it was were I obtained my last certification, before I let it slip because thanks, but no thanks.
There are only 2 ways to help without ending up completely screwed for helping:
- not being a certified anything: just call the emergency services
- being a certified whatever: work within an organisation, and never alone.