i love this thread. a few more scenes i didn't see mentioned:
"There Will Be Blood" ending (The Milkshake Scene) --
http://www.youtube.com/watch?v=s_hFTR6qyEo
"Goodfellas" (Funny like a clown scene)
http://www.youtube.com/watch?v=o_ff46b58Hk
Fargo (Fleeing the interview scene,
http://www.youtube.com/watch?v=Oy2HfixB9_8&t=2m13s
"The Shining" (here's johnny scene)
"Network" (I'm mad as hell ... )
http://www.youtube.com/watch?v=WGiX5tbLKiY
"Rocky" (Training montage)
"American Psycho" (Some scene, maybe "Business Card" scene)
http://www.youtube.com/watch?v=cISYzA36-ZY