The only thing that diminishes this is the fact that it didn't actually happen this way in real life. Because in real life, the AA gun was firing high explosive rounds and the Marines were getting hit by mortars too. The real Trombley still stood out in the open to call in the airstrike in spite of all of this.
Kocher threatening to "fuck up" Captain America to his face if he doesn't stop firing AK's at things. The Captain is obviously shaken and later in the day buries all his AK's.
Even better when Captain America tries to bayonet a prisoner Kocher flat out slugs him.
"Gentlemen, we just seized an airfield. That was pretty fucking ninja."
In the book only: Corporal Burris taking out the Iraqi T-72 tank with an anti-tank missile, literally blowing it to smithereens. Doubles as a Crowning Moment of Funny, at least to Captain Patterson.
Lt. Fick putting Casey Kasem in his place after the latter insulted him behind his back. In context, Fick is talking to Captain Schwetje and Casey Kasem walks up.
Fick: "I do, however, have an issue with unprofessional conduct of senior enlisted personnel in this company."
Casey Kasem: "Nate, I-"
Fick: "Gunnery Sergeant, you do not come up on a discussion between the captain and myself and speak unless you are spoken to, and nobody fucking spoke to you."
This Exchange between Doc and Encino Man:
Doc: "You want me to speak freely sir?"
Encino Man: "Yes."
Doc:"Well sir, quite frankly, I think you're incompetent to lead this squad."
Encino Man: "...I'm doing the best I can."
Doc: "Sir, it's just not good enough."
Colbert, Ray, Wright and Trombly's rendition of Teenage Dirtbag