When J.D., Turk, and Elliot are Wheeling the patient down the hallway the camera is close-up and they pass by a payphone on the wall. The camera goes to a wide shot and then they pass by the payphone again.
When JD removes the splinter from Janitor's foot he confuses fables. He states that the mouse removed the thorn from the lion's paw. The mouse chewed through the net that entrapped the lion. The slave Androcles removed the thorn from the lion's paw.
When Elliott and Carla are confronting the night-shift ER doctor, the clock on the wall shows a time of around 5 minutes past midnight. In the next scene, Dr. Cox goes home to Jordan and then the two of them go the Dr. Kelso's banquet. It seems highly unlikely that a banquet would take place so late at night.