I thought up this scenario while my fiance was in the hospital until 4am the other night because they thought she had a clot in her lung (thank god it wasn't, just very severe acid reflux)
I worked ina hospital for 2 years. Most hospitals (that I know of in this area) are relatively close to a psychiatric center. From my experience, they bring the 302 Patients into the hospital for evaluation before they ship them to the psych-center. They did this a few times while my fiance and I were in the hospital. So I thought of what I would do if one of the "crazy people" decided to go ape' and start tearing the place apart. Given the hospital's security was a joke, I don't think they would of been a big help. My first reaction would be to lock the sturdy, wood door we were behind, and hope he doesn't enter (I had my Glocks on me). If he managed to get in (I would of already moved Carrie to the bed farthest from the door, I'd try to get him the hell out (verbal, then OC). If he continued, he'd be asked at gunpoint.
You're sitting in the hospital with your signifigant other. A 302 patient goes crazy and starts running amok. What do you do? What would you do if he ran towards your room? What would you do if he started to come into your room?