Hicox: There's a special rung in Hell for people who waste good scotch. It seems I might be rapping at the door momentarily... (Downs the glass) I must say... damn good stuff, sir. Now... about this pickle we find ourselves in... it would appear there's only one thing left to do.
Hellstrom: And what would that be...?
Stiglitz (in English, to Hellstrom): Say "Auf Wiedersehn" to your Nazi balls!
When the theater burns as Shosanna's giant face laughs maniacally on-screen, and Donny and Omar shoot the living daylights out of everyone. Bonus points for Donny shooting Hitler's face into pudding.
Shosanna's hijacking the screening, full stop. Unlike the Basterds, she operates with no major plan which can go hare-brained and off the rails, she just edits the film to mockingly undermine the Nazis and declare she has a message for Germany, and then has the place burned to the ground. Even before he's shot to death, Hitler starts freaking out that a Jew has hijacked Goebbels great work.
The last scene when Lt. Aldo Raine gives Landa a swastika scar on his forehead as Utivitch grins like crazy.
"Nah, I'll prob'ly just get chewed out. Hell, I been chewed out before."
Doubly awesome for Raine's "The Reason You Suck" Speech right before. He points out that, given the circumstances, he's willing to let Landa have a nice little home on Nantucket Island as a condition for helping the Allies end the war that night. But at the end of the day, Landa is still a Nazi and would try to hide that reality from the rest of the world as he lives in retirement. And, as Raine puts it , "That I just can't abide."
Lt. Aldo Raine: This might just be my masterpiece.
When the Basterds are breaking Stiglitz out of prison, they gun down the Nazi guards, and he just casually sits there without twitching as the guards are being blown away.