Good Samaritan Sued???

I am not sure what this world is coming to when a good samiritan gets sued. I would hate to think that in order for someone to help another human being, they would have to check with local and state laws as well as have them sign a waiver of liability before helping someone in distress. Being a nurse, I always felt I was somewhat protected from lawsuits as long as there was not an exchange of money. Obviously I was very wrong.