Worst example is friend who, after being hospitalized for accident while car surfing, died car surfing again. I wasn’t present for either event.

Second worst is dude with head injury (unrelated) started talking about crystals and toxins and juice fasting. Called him out one day, and it was catastrophic. This one is still alive, at least AFAIK.

Third, divorce. You will find out who your real friends are when you get divorced.