From my own experience, the therapist can make you go to the hospital by calling the ambulance. In my case, I had no choice but to go with the paramedics. I was further evaluated at the hospital and admitted involuntarily. I think if you're there voluntarily, you have to give them three days notice if you want to leave. But if they don't think you should leave, they can try to have you kept involuntarily. At least that's what they told me.