There is no need to put in long hours at the hospital, the key to success for this rotation is quality, not quantity. Red Flags Safety is a really important issue for this rotation. You are not expected to handle violent patients. Do not be afraid to go to the Psych ER resident and say that you think a patient is becoming hostile. Everyone will tell you this, but you must trust your instincts.
Some patients are very sick and are unable to control themselves.
They may be hallucinating or having paranoid delusions. Do not feel that being cautious will affect your grade in any way. Everyone has a role in evaluating you, but your attending is primarily responsible for your evaluation. They read the write-ups, see your notes, and watch your interaction with the patients and staff. On PI5 where you work almost exclusively with a resident your attending will ask for feedback about you.