All mentioned here are great but one scene gives me chill the most and that's the look Michael gives Kay when he finds out about the abortion.

Oooooh, the abortion look. Mike took on the look of Satan in that scene. With his eyes tearing up, his lip shaking, wow.

The little half-smile Michael gives Carlo with the reassurance "Come on, you think I'd make my sister a widow? I'm godfather to your son Carlo"

Here's one more subtlety that I like so much - It's the drunk Fredo at wedding, and how he kisses Kay. Cazale is unimitable in this scene.

As stupid as Fredo was, I gotta say, IMO, he put in the best performance in GFII. The scene that sealed his fate, the "IT AINT THE WAY I WANTED IT" scene, is one of the best and most emotional movie scenes I've ever seen. You could feel is anger, his jealousy. The 2nd or 3rd time I saw it, I found myself screaming at my TV "SHUT UP FREDO! JUST SHUT UP! AND HE MIGHT LET YOU LIVE!"

The abortion scene is so awesome,the slow yet dramatic changes in Michael's face during that scene reminds me of old werewolf movies where the innocent man turns into a savage muderous beast. ALL HAIL PACINO!!

The abortion scene is great in another respect as well. The scene starts with children walking back and forth and inside the room kay and michael begin to argue. Against the backdrop of the children happily running around the floor, the argument inside turns really violent. Somewhat reminescent of the baptism scene.