Here's a quick tip regarding medical school clinical rotations:
A few third years have asked me if it's kosher to take a resident up on an offer to go home early.
Very few residents are trying to trick you or test you when they tell you to get out of the hospital. The one thing I would suggest - before you leave - would be to say, "Thank you. Is there anything I can do for you or for our patients before I go?" The comment will go a long way.