We're Alive REP-ivia!!!

[Wicked Sid]

SPOILER 

Question:

This is a two parter. A quote of a quote. What character says the following quote from a movie?
"We will spare your lives. Just walk away."

Name the character and the movie.

Burt quotes the character Humongous (I have no idea if I've spelled it correctly) from the film Mad Max 2 (The road warrior?).