I think the absolute funniest thing that ever happened in a psych ward was in an inner city one. There was man who had been there for awhile, pleaded with them to release him, but he was definitely not ready. So he plotted an (unsuccessful) escape route. During a time when we were all just sitting in the lounge hanging out, he had collected enough of the little packets of vaseline over his stay there. He drenched his whole body in it, ran around the psych ward stark naked and avoided any staff or security from catching him since the vaseline caused him to slip through their grip. He waited for someone to open the door so he could run through it, but a nurse went out to make sure no one did. Not to mention it was two sets of doors. It took 10 people to corner him, throw a blanket wrap over him and restrain him. But even the staff running after him couldn't help but laugh.