Long story short, a vengeful ex-girlfriend had me put in 72 hour mandatory psych evaluation twice because she didn't want me to break up with her. She claimed I was threatening to kill myself when that wasn't the case.
The first time, I freaked out and had to be held down by a group of people, including an orderly that purposely hurt me and left a large bruise on my shin after pushing it downwards against a metal bar off of a hospital bed. I was shot up with morphine to calm me down and then strapped in to a bed - and all I recall after that is waking up in the morning to someone staring at me from the door way. Supposedly, action was taken against the orderly - but I have no guarantee or follow up on that. Additionally, when the police originally arrived at my apartment, two officers searched it looking for a weapon (they found a steak knife that had fallen next to the stove which they questioned me about - I don't even remember it falling there - could've been there for a while) - I am pretty sure they had no right to search my place, but I could be wrong.
The second time, I was forced to take double the dose of the medication I normally took for anti-anxiety/depression which actually caused me to hallucinate while I was locked up. This 72-hour hold actually lasted much longer because the staff psychiatrist left for an extended Thanksgiving weekend, so it came out to 5 days.
It truly worries me how bad of an experience this was. I met some interesting people with interesting issues during these two brief experiences - but I don't see how they were being provided with the help they actually needed.