[Tinuviel the Nightingale]

Where Gandalf and Saruman are having a staff fight in FOTR, Gandlaf suddenly screams out "Riktusempra!"

In TTT where Eowyn and Aragorn are sword-fighting you can just picture the nyaowng, nyaowng sounds of light sabres.

Also after that afore-mentioned segment where Aragorn asks "What do you fear" or something, Eowyn replies with, "Bunnies!"
Note: This is technically from Buffy the Vampire Slayer, so it's actually a TV reference but, oh well.

I'm having a good day!