THe Hobbits talking about Aragon not letting them eat 2nd breakfast.
Gimli's classic, I have the eyes of a hawk, the ears of a fox and that he couldn't be surprised only to run into the arrows of Galardriel's guards.
"Nobody tosses the Dwarf" is a classic on its own.
"They have a cave troll." its the way Boromir says it that made it humourous.
Gandalf's defiance of the Balrog...
Boromir's death speech which I found cheesy but inspirational.
BTW, when I was watching the goblins/orcs swarm out of every hole, nook and cranny in Moria, a scene from Dork Tower flashed through my mind "3,012 orcs, we attack huzzah!"
Arise, arise, Riders of Theoden!
Fell deed awake: fire and slaughter!
Spear shall be shaken, shields be splintered,
a sword-day, a red-day, ere the sun rises!
Ride now, ride now! Ride to Gondor!
Theoden King: The Return of the King