My duties in the ER include, assisting new intakes and orienting them, fetching food trays for those who need them (whichever is there, the name is irrelevant - this I took on board when I decided to give the only "real" lunch to the HIV +, dehydrated man living in an SRO who clearly needed it way more than the rather overweight woman whose name was actually on the tray, and a choice subsequently lauded by the volunteer trainer RN). I spent the time either actually taking things to the lab or blood bank, or putting them in the containers and sending them by "tube". I walked around asking for jobs in the various departments, fetching food trays, offering and fetching ice water, or just chatting with people. I almost got to see a lumbar puncture, but the patient decided not to have one - he'd previously had that experience and, upon discussion with the doctor, it seemed highly unlikely that it would have been very helpful since he almost certainly did not have the meningitis the LP would have found. He had shingles on his head and, while the doctor stated that he was pretty sure he didn't have anything else at this point, the LP would completely rule it out.
In the end, I did more than my 5 hours. Much more interesting and "happening" than patient rounding.