1. CPR
CPR in movies is just done all wrong. A pulse is never checked for prior to doing chest compressions in film, the presence of which would preclude the need for CPR at all. And when it's done... shoddy, shoddy work. CPR is a quick and vigorous endeavor, with optimally over 100 pumps per minute that go a multiple centimeters deep. Even on the X-Files, Dana Scully and other doctors would perform pitiful cardiopulmonary resuscitation. And she was a
doctor. Scully should know better. The blood they're trying to move would never make it all the way up to someone's brain. Real CPR is brutal, with ribs often cracking from the pressure. Of course, when CPR is over, people rarely just wake up and act fully alert. Needing CPR in the first place means your
heart stopped working, usually a sign you're not gonna just get up and say "shucks, what just happened?" And God, I'm not even gonna cover defibrillators.
Honorable mentions: nosebleeds being a harbinger of impending death, portrayal of mental illness as something cured by dancing with Jennifer Lawrence. Got more to add? There's a million. Write 'em below or find out how to get at me in my bio.