If you act in good faith to help someone in an emergency, you can't be successfully sued unless:
5AD. Protection of good samaritans
(1) A good samaritan does not incur any personal civil liability in respect of an act or omission done or made by the good samaritan at the scene of an emergency in good faith and without recklessness in assisting a person in apparent need of emergency assistance.
(2) A medically qualified good samaritan does not incur any personal civil liability for advice given in good faith and without recklessness about the assistance to be given to a person in apparent need of emergency assistance.
(3) This section does not affect the vicarious liability of any person for the acts or omissions or advice of the good samaritan or medically qualified good samaritan.
5AE. Exclusion from protection
The protection from personal civil liability conferred by this Part does not apply if the ability of the good samaritan or medically qualified good samaritan to exercise reasonable care and skill, at the relevant time, was significantly impaired by reason of the good samaritan or medically qualified good samaritan being intoxicated by alcohol or a drug or other substance capable of intoxicating a person and the intoxication was self-induced.