One of my favorite fight scenes was in one of the Bourne movies.Jason was attacked by an operative in the small apartment.Apparently he used the Israeli discipline Krav Maga.They used everything from books to the toilet tank lid and when the bad guy had enough, he went down.
In fights, a bad guy will always cheat and a good guy will never use a dirty move.
*if I was there and some scary guy was beating the crap outta me, I'd be using a fork to the eye if it would stop him
Adding to Lance's post, a gun can be fired 500 times without jamming or dry firing.(Unless the jam is integral to the plot)
bad guys are never smart enough to shoot the good guy in the head...
Adding to both Lance and Dee's post, bad guys always have to tie the good guy up and leave him somewhere.(while either explaining the plan, or laughing) They can never give the good guy a simple double tap to the head.
In TV shows, the hot chick never gets naked.
Food and beverages are often ready in seconds.You never see a conversation hi-lighted by one character spending 3 hours cooking a roast with all of the side dishes.
Cops never wait for back up and rarely wear bullet proof vests when knocking down dangerous criminal's doors.
If the local law enforcement is joined by any other law enforcement agency, they will never cooperate and inevitably a pissing match will ensue.
In film noir or in any nighttime shots of a large city on TV, the streets are always wet.
*spoilers for the movies Seven and Silence of the Lambs*
Women will always walk alone at night, through parks and down scary back alleys.