As a Moments subpage, all spoilers are unmarked as per policy. You Have Been Warned.

Mace gets pissed when Lenny offers her current passenger some Playback and throws him out of her limo. Lenny leaps onto the hood as she's pulling away and takes a ride anyway, snarking that he's having trouble hearing the stereo.
After Mace turns the tables on Gant's goons and saves him, Lenny runs back into the room and gives one of them a swift kick in the balls while he's on the ground.
Aww, that is fucked-up, man!
Also: "This tie doesn't go with blue!"
Sensing an intruder in his apartment Lenny grabs his pistol to confront him. 30 seconds later he remembers to go back to get his magazine so that the gun is actually loaded.
Lenny runs into his former boss, Strickland:
Strickland: Nero.
Lenny Nero: Strickland.
Strickland: Commissioner Strickland!
Lenny: See, since you shit-canned my career, I don't even have to call you sir. One of life's small pleasures.
- Later in that same conversation:
Strickland: You're a disappointment, Nero. But you know what disappoints me more?
Lenny: Your sex life?
After Mace gets into a sexy dress for the New Year's Eve Party:
Lenny: Hey, Mace. That dress looks good on you. I, I mean, better than it would on me.
Mace: Thank you. I think.
- Doubles as a Heartwarming Moment.
This Gallows Humor after Max's Face–Heel Turn.
Lenny: I didn't know you were color blind, Max.
Max: It was the only way I could stand your ties.

Funny / Strange Days