>movie protagonist fights villain >both of them start bleeding

>>38301924
would atleast make sense if they get hit in the lungs or other esophagus related part, but yeah overused

>>38301924
When you get punched in the face, the inside of your mouth will typically get cut by your teeth. Then you'll have blood in your mouth.

It's a defense mechanism. You can then spit that blood at your foe, infecting them with whatever diseases you may carry before making your swift escape.

>>38302082
This.
Also you've never had your nose broken OP, you end up with a lot of blood in your mouth.