The Abominable Dr. Phibes (1971)

Factual error: In keeping with the theme of the Ten Plagues of Egypt, Doctor Phibes has one of his victims eaten alive by locusts. Not likely. Locusts are strictly herbivorous, and like all herbivores locusts won't touch anything that moves. They would not be attracted by the slimy goo poured over their 'victim', because they zero in on plant pheromones and nothing else.

Dr. Anton Phibes: Where can we find two better hemispheres, without sharp north, without declining west? My face in thine eye, thine in mine appears, and true plain hearts do in thee faces rest. Within twenty-four hours, my work will be finished, and then, my precious jewel, I will join you in your setting. We shall be reunited forever in a secluded corner of the great elysian field of the beautiful beyond.

Question: One of the doctors Phibes blames for his wife's death during an operation is Dr. Hargreaves, whose head is crushed inside a frog mask during a costume ball. But earlier, while introducing himself to Phibes, Dr. Hargreaves says he is a psychiatrist ("headshrinker"). Why would a psychiatrist be present during an operation to save someone's life?