When sister Jude shaves a hair of the patient, there's a cloth on the floor to catch the hair. However after the patient has left, she just picks up and folds away the cloth. No hair is seen.
At the very beginning, Leo Morrison is seen using a Leica M7 camera, taking a few photos of his wife in rapid succession. The Leica M7 is an analog 35mm camera, where the film needs to be advanced manually after each shot using the the film advance lever, making the taking of photos in rapid succession impossible.