Probably when Lando says...
"We're on our way, Red group, Gold group, all fighters follow me. Ha ha ha, I told you they'd do it!"
...followed by an EPIC music sting and heroic FX shot :-)
It's all I can do to not jump up and down with excitement when he says that line, no matter how many viewings and years have since I first heard it.
Not the most original line (You could slot it into a WWII movie without trace, as you could with many SW lines) but it's the way Billy Dee Williams delivers it.