Just thought of a couple more...
Gandalf: You cannot pass! *brandishes Uzi*
Aragorn: (Holding up walkie-talkie) *Scchrrtt* Bravo one, pull back, I repeat, pull back. *Scchrrtt*
Gandalf: I'm a member of the SAS, wielder of the M16! The flamethrower will never avail you, Flame of Udun!
The balrog blasts a jet of flame, but Gandalf activates his heat-deflecting charm from his staff.
Gandalf: (Arming C4) You - Shall Not - Pass!
Gandalf throws the C4 below the Balrog, and the bridge explodes. The balrog acts fast, however, and fires a grappling hook, latching on to Gandalf.
Gandalf: Run, you dumbasses!
Boromir: Go go go!
Aragorn stands, bewildered. Finally, he comes to his senses and runs. He whips out the walkie-talkie and turns it on.
Aragorn: *Scchrrtt* Bravo company, Bravo one is down. I repeat, Bravo one is down. Regroup outside for first aid. *Scchrrtt*
Legolas: *Scchrrtt* Roger, Bravo two. Sad day isn't it? *Scchrrtt*
Aragorn: *Scchrrtt* Yes.. a sad day. *Scchrrtt*
Arwen: The light of the Evenstar does not wax and wane—
Aragorn: How come?
Arwen: Energizer batteries.