Moon of the Wolf (1972)

Revealing mistake: Just before Louise shoots him, Andrew turns to face the camera, and the blood packs under his shirt are very visibly outlined.

Jean G

Sheriff Aaron Whitaker: What's wrong with him?
Dr. Druten: He's had a fit.
Sheriff Aaron Whitaker: Doctor, you were third in your class. I never went to college. I knew he was having a fit when he started having it.