Visible crew/equipment: In the fainting scene you can see in the background on the roofs and in the windows a number of people just watching the shooting being done on the back lot. It is very noticeable in the last wide pull back shot.
Factual error: After Albert feeds the pill to the turtle, you see a close up of its eyes, which are blue. Turtles only have either brown or red eyes, not blue.
Revealing mistake: During the fainting scene number of the extras can be seen waving and looking at the camera.
