Thor- Life's Too Short
Here's a vid idea that was first suggested to me by XSuperNinjaExtremeX in a comment. I'd never heard of the song, since I don't have the deluxe Frozen soundtrack, but it worked out PERFECTLY for Thor and Loki.
I attempted to lip-sync this vid, which was no easy task, since the song is sung so much slower than the dialogue being spoken. I think I did an okay job matching it all up together. The passive-aggressiveness of the lyrics fit in perfectly with the two brothers, who are much more comfortable punching things out instead of talking about them.
Song: Life's Too Short (Deleted song from Frozen)
Artist: Frozen OST
Footage: Thor (+ deleted scenes), The Avengers, and Thor: The Dark World