Boss Tanaka's decapitation. It's so over the top that it becomes hilarious, with many of the Yakuzas all but freaking out and Gogo Yubari (the most psychotic of O-Ren's posse) having a barely-restrained grin on her face.
Same with Sofie Fatale (O-ren's lawyer), who laughs a little and then calmly translates into Japanese what O-ren is telling the Yakuza in English.
Tanaka's ten-foot fountain of blood looked like something right out of Monty Python, and this being Tarantino, that's definitely the point.
"From here, you can get an excellent view of my foot." *kicks*
HAHAHAHA! *strokes beard*
The Bride stomps her way out of the cemetery in the middle of the night after being Buried Alive, covered in dirt, wanders to a Greasy Spoon diner across the road, and then calmly sits down at the counter and asks for a glass of water.
When the last of the Crazy 88 is standing, The Bride is about to kill him when the lights turn on and she sees it's a terrified teenage boy. She bends him over her knee, spanks him with the flat of her blade and sends him off.
It's even funnier in the uncut Japanese version, because this is the Bride's second encounter with him in the fight. The first time, she cuts off his mask and after seeing that he is a whimpering teenager, tosses him into a group of mooks.
"Now, this concerns you."
"I've always liked that word 'gargantuan'. It's a shame I so rarely have a chance to use it in a sentence."
The Bride meeting Vernita Green. First, a Narm Charm-tastic sequence of zooming in on each face as the Ironside theme plays. The Bride then punches Vernita in the face.
The No-Holds-Barred Beatdown that goes from Copperhead's living room to the kitchen and back again. When the front door is about to open and Copperhead's daughter comes back in, she very calmly dismisses the mess the fight has made, while she and the Bride very casually hide their knives behind their backs.
"I should've been the motherfuckin' Black Mamba!"
Vernita keeps a gun hidden in a box of "KABOOM" cereal.
When fighting the Crazy 88, the Bride snatches out one guy's eye and throws it down the throat of another guy. We get a Reaction Shot from Sofie (who's lying on the floor with her arm cut off) where she goes, "Eurgh." It's hilarious.
"And... that hat. That fuckin' hat.... How many times have I told you, don't wear that fucking hat here." [...] "I'm not the boss of the customers, I'm the boss of you. And I'm telling you, that I want you to keep that shit-kicker hat at home!"
When Elle Driver's remaining eye has just been ripped out:
I'll kill you, you fucking bitch! You fucking bitch! I'll kill you! ... oh shit.
"I would have been much nicer. I would have just cut your face."
After The Bride finally meets Bill and their child in the flesh, she finds them both playing pretend shooting, the Bride trying to keep it together at the sight of her own child. After her kid "shoots" her, she plays along after a few minutes of shock and silence.
Hilariously, Bill starts narrating as the Bride's just standing there, stunned.
The Bride's reaction to Bill's explanation: "You overreacted?! THAT's your explanation?!"