Fistfights Are Harmless
Movie characters frequently engage in brawls and fistfights like it's nothing out of the ordinary, and most of the time they conclude with everyone getting up and carrying on with their days as usual. It almost seems that receiving several blows to the face and other exposed areas of the body is of no great concern.
But, if fistfights in movies were actually happening, there would be a lot more occurrences of long-term brain injury and concussions. With even one of the numerous punches you see thrown around in action movies, the majority of people would definitely pass out due to a serious concussion or even suffer long-term chronic problems.