Leslie, delirious with flu and barely able to walk, escapes from the hospital to give a masterful speech to the Pawnee Chamber of Commerce drumming up support for a community project. The awesomeness is in no way diminished by her immediately, upon the speech's conclusion, becoming completely incoherent again. An awed Ben says in a talking head:
That was amazing. That was a flu-ridden Michael Jordan at the '97 NBC Finals. That was Kirk Gibson hobbling up to the plate and hitting a homer off of Dennis Eckersley. That was... that was Leslie Knope.
Ron Swanson telling off Tammy in "Ron and Tammy 2".
Tammy: You're not even a man anymore. I faked four of the seven orgasms last night. Ron: So did I.
The Harvest Festival episode showed that Ron Swanson is a man who would instantly solve everyone's problem just to shut them up.
Ron: All of you be quiet. Andy, sheís mad because you said ďawesome sauceĒ instead of ďI love you too." April, he loves you. Stop being a child. Tom, youíre clearly at fault here. Blaming Jerry wonít save you. Jerry, we both know you were shotgunning funnel cakes instead of watching Lil Sebastian. So everyone apologize to everyone else!
Ron explaining to Chris why the changes he made to the Parks and Rec dept. aren't working and making everyone miserable. Before agreeing to a compromise of staying at the circular desk Chris made him use for a week while the rest change back to normal, Ron demonstrates great insight to his employees.
Ron: Tom only performs when there's someone to impress, so marooning him on 'Freak Island' isn't helping anyone. And you made April assistant to everyone? You know who April hates? Everyone. And Jerry can only function when noone's looking. You shine a light on him and he shrinks up faster than an Eskimo's scrotum.
In "Ron & Tammys", a drinking contest is held between Ron's mother and his first wife and the winner gets Ron to come with her. They drink Swanson family mash liquor, whose "only legal use is to strip the varnish off of speedboats". Wanting Ron to stay a the office, Leslie joins in and gets drunk after a couple of shots. April takes one sip, spits it out and collapses. Finally wanting to end this and decide his own fate, Ron takes the jug in one hand and drinks down the rest of it with no problem.
In "Bowling for Votes" Ben punches out a potential Jerk Ass voter who called Leslie a "bitch". Leslie even says right afterward that it was "awesome" and kisses him.
In "Lucky" Leslie bombs an impromptu interview by showing up drunk. However she is saved by the tape of it being lost in airport luggage. The Stinger reveals that the airport staff, whom Leslie has done much for in the past, purposely threw it in the trash.
Leslie's speech during her campaign in response to the Newports threatening to leave Pawnee and take their candy business with them if Bobby Newport doesn't get elected.
Iím very angry. Iím angry that Bobby Newport would hold this town hostage and threaten to leave if you donít give him what he wants. Itís despicable. Corporations are not allowed to dictate what a city needs. That power belongs to the people. Bobby Newport and his daddy would like you to think it belongs to them. I love this town, and when you love something you donít threaten it. You donít punish it. You fight for it, you take care of it, you put it first. As your City Councilor, Iíll make sure that no one takes advantage of Pawnee. If I seem too passionate, itís because I care. If I come on strong, itís because I feel strongly, and if I push too hard, itís because things arenít moving fast enough. This is my home, you are my family, and I promise you, Iím not going anywhere.
Made even better by Bobby Newport's reaction.
Holy shit, Leslie, that was awesome!
When Leslie wins.
April threatening Ellis into getting him to do work for Ben in Soda Tax (Season 5 Episode 2).
April: Ben told you to finish the website,and if you don't do it, I swear to God, I'm gonna murder you in your sleep. I know where you live. 14th Street, right? I'm gonna get a melon baller and scoop your eyes out and eat them, and your congressman uncle is gonna have to buy you a dog to drag your eyeless face around. Do you understand me?
Ron and Ben's father reaching for the last shrimp at the party. Yes, basically Ron Swanson and Mike Ehrmantraut staring each other down.
In "Pawnee Commons", two designers from Eagleton came in with a joke model for Leslie's park. Leslie's voice got really low and her eyes filled with murder.
Leslie: You have five seconds to get out of here, or I will rip your throats out.
Ron's friends decided to have a sudden wedding. But they can't find wedding rings in time. Ron does what any person would do : Extract a lamp from the wall, and then develop a pair of rings using the metal from the lamp - Liquifying the metal and all.
Ron: People who buy things are suckers.
Ron Swanson punching Councilman Jamm in the face.
To add to this, Chris and Andy getting out of their seats in defense of Leslie, showing that the only reason Ron got the honor is likely because he was physically closer.
Ann getting a reluctant April to sing Cyndi Lauper's "Time After Time" with her and Donna suddenly joining in.
During the Trial of Leslie Knope, Tammy Two was going to take the opportunity to slander Leslie. Chris than says the following.
"Just remember that you're under oath and if you lie I will fire and prosecute you."
Tammy proceeds to leave the room in a hurry.
The fact Chris managed to take down Tammy Two with one sentence. Taking her down is impossible for Leslie, with Ron and Diane being the only ones able to subdue her and/or get her to back down normally, and even then they don't always succeed.
The Pawnee/Eagleton unity concert in "Moving Up" features Ginuwine (who is, in fact, Donna's cousin), The Decemberists, a Mouse Rat reunion and Letters To Cleo!
Culminating in a rendition of "5000 Candles in the Wind" by all of the above, plus a sax solo by Mr Duke Silver!
To this troper, the entire finale. The writers try to write every season finale as if it's a series finale. If they can keep topping themselves until they write this masterpiece, then I can't wait to see what they do for the finale of season seven, the final season.