In "Random on Purpose" Abby is seconds away from being chopped into pieces. Sam and Callen are standing above the room, at a skylight. They conclude that they can't jump down there safely. So, what do they do? Lower Callen in on a fire hose to shoot the bastard holding the axe.
"You're not traceless. You've got my teeth marks in your finger, you creep!"
The team convincing a militia that they had an entire army upon them, when it was just 4 people, tops. Hetty's move with the F-22s is the kicker.
Kensi and Deeks combine to get one in Deliverance getting Kensi out of the room full of lasers using balance and what's in Deeks' pocket.
Four words: "I broke the internet."
In "Personal", Deeks, after two conversations, pranking Kensi and flirting with the nurse, clocks the fact that they probably haven't caught the person who shot him, knows that there's something wrong with whatever happened to him and it probably wasn't a simple robbery. Not quite a Sherlock Scan, but Kensi checked the nurse's badge against her face, meaning heightened security and she was expecting someone to come after him again. Kensi confirms all of these things by telling him he had been targeted.
Even more awesome, without the assistance of Erik and the team, Deeks is the one who solves his own case from his hospital bed. After a few conversations about being more security conscious and the make and model of the gun. Deeks figures out that he was targeted to draw out the team. With that information, Kensi takes off to help Sam and Callen, even though Deeks tells her to wait, because he was still going through the facts. The people who shot him were at the hospital, so they weren't after Sam or Callen, but Kensi, who has just left the security of the hospital guard and run into the suspects. While she gains a bit of time fighting them off. Deeks comes to her rescue and shoots the suspect with the gun, so she can finish the job and kill the other two suspects...after being in shot twice, the subsequent surgery, spending the day going over his old enemies, and almost no recovery time... because they were going after his partner.
Both a Crowning Moment of Awesome and a Crowning Moment of Funny at the same time, following up the idea that Deeks needed to improve his personal security from "Personal" Sam stakes out Deeks the first day he's supposed to come back. Deeks never showed and Sam's late to work. Since Deeks is missing, they decide to call him. And his phone rings...in Sam's bag. Deeks walks in, picks up his phone our of Sam's hand and...
Deeks: That'd be for me.
In the Season Three premiere, "Lange, H.", the team storms the crime family's house to rescue Hetty and completely curbstomp the guards.
Agent Callen, not willing to let the Chameleon go free, kills the guy in cold blood. On live TV. He gets arrested for it. But the bastard had itcoming.
Made even more amazing when it's revealed, in the season premiere, that it was all part of a massive Batman Gambit by the LA crew that even SECNNAV wasn't privy to!
Nell gets held hostage by an elite trainer of special operations soldiers. In one move, she steals the magazine out of his rifle and hits the dirt, simultaneously depriving her captor of his meat shield and his ability to defend himself from her enraged teammates.
Meta example - Ernie Reyes Jr., Chris O'Donnell and LL Cool J, did all of their stunts for an insane Sayoc choreographed three person fight. In record filming time. IIRC, they nailed it on the first take.