When they were watching the play about themselves, and Zuko said the exact same thing as the guy playing him.
The scene where the kid walks up to Zuko and tells him that his scar is on the wrong side.
Sokka on cactus juice.
Prince Zuko talking to himself when he was trying to join the Avatar.
Iroh singing the soldier boy song on that hill.
When Iroh was faking that he was paralised, when the whip chick was on him. xd
Momo dancing with monkeys. xd
The freeze frame scene, whilst they we're riding down the shoots in Omashu.