Various, but special mention to the scene with three parallel cars. Avi/Tony/Rosebud transporting Boris in the trunk (they have knives), Sol, Vinnie, and Tyrone dealing with replica guns, and Turkish and Tommy who have milk. It gets even better when the guns are tested.
Three men arguing over how to get rid of a body. "I create the bodies! I don't erase the bodies!" That little grace note of comic genius, though, is the fact that the entire scene is shot from the body's point of view.
Tyrone: I didn't see it there. Vinny: It's a four ton truck, Tyrone. It's not as if it's a bag of fucking peanuts, is it? Tyrone: It was a funny angle. [All three turn and look back at the truck] Vinny: It's behind you, Tyrone. Whenever you reverse, things come from behind you.
Brick Top: Pull your tongue out of my arsehole, Gary. Dogs do that. You're not a dog are ya Gary? Gary: No, no I'm not. Brick Top: However, you do have all the characteristics of a dog, Gary... All except loyalty. (Errol, another henchman, zaps Gary in the side with a stun gun, while Liam pulls a plastic bag over his head) Turkish:(narrating) It's rumored that Brick Top's favorite means of dispatch involves a stun gun, a plastic bag, a roll of tape, and a pack of hungry pigs. (Brick Top eyes Liam, and strolls casually past him.) Brick Top: You're a ruthless little cunt, Liam, I'll give you that... but I've got no time for grassers. (Behind him, Errol pulls a plastic bag over Liam's head, and drags him to the ground in a suffocated heap.) Brick Top: Feed 'em to the pigs, Errol. (He turns to face the boxers in the ring, who are staring at him in abject horror) Brick Top: What the fuck are you two looking at?
Doug coming across some teenage boys smoking outside his shop. In full Orthodox Jewish clothing.
Doug: What are you doin' here? Youth: (spits) It's a free country, innit? Doug: Well it ain't a free shop, is it? So fuck off!
The entire bookie robbery, especially the part where Sol leaves his shotgun in reach of the attendant, and the failed attempt to get through the "security door," particularly because Tyrone shows them that it opens in instead of out..