I believe EMS should not transport psych patients period! Unless they slashed there wrists and are bleeding out or overdosed and are unconscious, in otehr words we should not transport unless its a medical problem!
Violent psyche, hmmm, sounds like a police matter, what the hell am I going to do as an EMT, Im not armed. A medic can push drugs, but really, not an EMS matter, sorry.
If your a voluntary commit and want to open the backdoors and run, I am not stopping you, run Forest run! I cant stop you legally and even if you are a involuntary, I still am not stopping you! im not a cop, not my problem.