Continuity mistake: When Kelso gives Cox the rounds and Cox is surprised, he starts spanking himself with the clipboard. Notice the two women about to walk past Cox. One is in a red top, one in pink. The next shot they are passing the doors, which is well ahead of Cox. The following shot they are about to pass Cox again.
Character mistake: When Elliot asks Kelso if there is a special way to communicate with the nurses. Kelso grabs Elliot by the arm and his hand being placed on her sleeve and pull her to the side while still holding her arm, when the camera angels changes from the close-up his hand placement is lower and not on Elliot's sleeve but on her skin. (00:07:00 - 00:07:40)