The Movie Cliches List has every scene ever repeated over and over in Hollywood. Well, may not every one, but lots.

This one drives me particularly up a wall:

The fact that a woman is pregnant or the fact that she notes her pregnancy is introduced by a scene where you hear the woman vomit.

And every time a woman is sick it’s because she’s pregnant. Like women don’t get stomach flu or food poisoning.

All members of alien species wear the same outfits, including clothing, hairstyles, and jewelery. This makes them readily identifiable. Aliens who do not dress like aliens are hiding something.

See every Star Trek episode ever. Well, sometimes there are are TWO cultures.

People never cough, sneeze, blow their noses, or show any other symptoms of being in less than perfect health.
Only exception to the above is when they’re dying. A cough is a symptom of terminal illness.

Man, and I thought throwing up was harsh.

Also:

When the hero is knocked out, he won’t get a concussion or brain damage. People hit on the head will not throw up.

Because if they did, then they would be pregnant.