What is the biggest military movie/TV goof, basically the military Movie/TV mistakes that annoys you the most?

Tie between:

Sound of a hammer cocking when the guns are Glocks or
Guy pointing a pump shotgun at someone and racks the action to show he means business, means he was pointing a shotgun with nothing in the chamber.

Semi-automatic pistols that do not have the slide back when the last round is fired and the shooter pulls the trigger and the weapon goes 'click.' And other weapon 'peeve' are with the bolt-action rifles - the shooter cycles through weapon to load it?

Saw a TV movie the other night and it made me realize what a wuss I am. A sniper , using a 50 cal. rifle, shot the hero in the arm. He staggered a few feet then fell down. His buddies got a first aid kit from the van and patched him up and they all ran off. He continued his mission with a big band aid on. When I got hit with shrapnel from a RPG I went ape. It hurt and there was blood. Mine which made it worse.

battleship...very improbable

Grooming.

The erroneous immense explosions (with fireballs) in almost every movie or TV show when a grenade (doesn't matter what country/type) is thrown. I just groan and shake my head.

Any movie or TV show that cuts to someone with a weapon and you hear them chambering a round sometimes multiple times in the same scene. Especially someone with a shotgun. How many times do you have to chamber your special Hollywood shotgun to get it to work? What's the point of having the weapon for defense / attack if you have to chamber it 10 times to get it to work?

On the short lived TV sho Key West, a Naval Officer had his shoulder boards pointed out instead of in for 1 scene. He had them right the rest of the time.

Well, it might not be a military error, but anyone notice how Robert Whul's character in "Good Morning Vietnam" went from being Army to Air Force, then back to Army?

I hate it when someone fires a shoulder weapon and it blows a vehicle 20 feet into the air. I reckon most all those Anti-Tank weapons are firing shape charges or a chunk of Sabot which is not going to flip a vehicle unless it is loaded with explosives.